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Curriculum Vitae│Junjie Zhang
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Materials Science Division, Argonne National Laboratory, 9700 S Cass Ave, Argonne, IL 60439
Cell: (773)344-4267, Email: [email protected] / [email protected]
Researchid: http://www.researcherid.com/rid/C-4129-2008 Orcid: http://orcid.org/0000-0002-5561-1330
Highlights
• 2 research grants (Funding summary: RMB 60, 000)
• 28 papers (12 first-author), including Nat. Phys. (1), Proc. Natl. Acad. Sci. USA (1), Chem. Mater. (2),
Cryst. Growth & Des. (3), CrystEngComm (3), J. Mater. Chem. A (1), Chem. Commun. (1), Opt.
Express (1), Appl. Phys. Lett (2), and J. Appl. Phys. (2). The paper on Proc. Natl. Acad. Sci. USA has
been highlighted at U. S. Department of Energy, PHYS ORG and Argonne National Laboratory. One
paper on CrystEngComm was selected as a Hot Article.
• 3 Chinese patents
• 2017 APS-DMP Post-Doctoral Travel Awards ($800)
• Selected to attend the 63rd Lindau Nobel Laureate Meeting, Germany (2013)
• Scholarship Award for Excellent Doctoral Student granted by the Ministry of Education of the People’s
Republic of China (2012)
• Session Chair (Manganites and Cobaltites), American Physical Society March Meeting 2016
• Reviewer for J. Mater. Chem. C, CrystEngComm, J. Cryst. Growth, Eur. J. Inorg. Chem., New J.
Chem., RSC Adv., New J. Chem., and Laboratory Directed Research and Development (LDRD)
proposals for Argonne National Laboratory
• Membership of the American Physical Society and American Chemical Society
• 4 seminars, 6 oral presentations and 5 posters in international/national conferences since 2011
Appointments
• Postdoctoral Researcher 2013- Present
Materials Science Division, Argonne National Laboratory
Research interest: Synthesize and grow crystals of emerging materials, and understand the
relationships between crystal/magnetic structure and electronic and magnetic properties.
Supervisor: Dr. John F. Mitchell
• Research Assistant 2008- 2013
Institute of Crystal Materials, Shandong University
Education
• Ph.D. in Materials Science 2008-2013
Institute of Crystal Materials, Shandong University
Dissertation: “Crystal Growth, Characterization and Nonlinear Optical Frequency Conversion
Investigation of New Molybdenum Tellurites” Supervisor: Prof. Xutang Tao
• B. Eng. 2004-2008
School of Materials Science and Engineering, Shandong University
Curriculum Vitae│Junjie Zhang
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Research Grants
• Graduate Innovation Foundation of Shandong University: “Growth and characterization of the
nonlinear optical crystal Cs2TeMo3O12”, 12/2010- 05/2013, RMB 30, 000
Role: Principal Investigator
• The Ministry of Education of the People’s Republic of China: Scholarship Award for Excellent Doctoral
Student, 12/2012- 06/2013, RMB 30, 000
Role: Principal Investigator
Honors, Awards and Recognitions
• 2017 APS-DMP Post-Doctoral Travel Awards ($800) 2017
• Natural Science Award (2nd place) of Chinese Universities
(Xutang Tao, Zeliang Gao, Weiguo Zhang, Junjie Zhang, Youxuan Sun, Minhua Jiang) 2015
• Excellent Doctoral Dissertation of Shandong Province 2014
• Excellent Doctoral Dissertation of Shandong University 2014
• Outstanding Graduate Student of Shandong Province 2013
• Selected to attend the 63rd Nobel Laureates Meeting
at Lindau, Germany (only 25 nominees from China and 625 around the world) 2013
• Scholarship Award for Excellent Doctoral Student granted by the Ministry
of Education of the People’s Republic of China 2012
• National Scholarship 2012
• President’s Scholarship of Shandong University 2012
• ‘Wu-Si’ Young Scientist Award of Shandong University 2012
• Supported by the Excellent Doctoral Training Program of Shandong University 2011
• Supported by the Graduate Innovation Foundation of Shandong University 2010
• National Scholarship 2006
• Scholarship for Excellent Student 2005, 2006 & 2007
Professional Activities
• Session Chair (Manganites and Cobaltites), 2016 American Physical Society March Meeting
• Reviewer for Journal of Materials Chemistry C, CrystEngComm, Journal of Crystal Growth, European
Journal of Inorganic Chemistry, New Journal of Chemistry, and RSC Advances
• Reviewer for Laboratory Directed Research and Development (LDRD) proposals for Argonne National
Laboratory 2015
• Membership of the American Physical Society and American Chemical Society.
Professional Experience
• Crystal Growth. Single crystal growth using high-pressure floating zone techniques (a 150-bar high
pressure floating furnace, only 2 in North America), top-seeded solution growth (TSSG) method, flux
method and Bridgman–Stockbarger techniques.
• Characterization. Magnetization/resistivity/heat capacity measurements using PPMS/MPMS; optical
spectroscopy (UV-Vis, IR, and Raman); second-harmonic generation efficiency measurements using
Curriculum Vitae│Junjie Zhang
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the Kurtz method; characterization of thermal properties including melting point (DSC/TGA), specific
heat (DSC), thermal expansion (TMA) and thermal diffusivity.
• X-ray Experience. Structural study using single crystal and powder X-ray diffraction/scattering.
Eight-year experience with in-house x-rays (single crystal diffractometers such as Bruker APEX2 and
STOE, and powder diffractometers such as PANalytical X’Pert and Bruker D8 Advance) and
three-year experience (>15 accepted proposals, >86 shifts = 688 hours) with synchrotron x-rays at
Advanced Photon Source (single crystal structural determination and diffuse scattering at 15-ID-B,
x-ray absorption at 4-ID-C, high-energy x-ray diffraction at 11-ID-C, powder x-ray diffraction at 11-BM
and inelastic x-ray scattering at 30-ID-C). Experienced with softwares including APEX2/3 (Bruker
XAS), SHELXTL, Jana2006, X-Area (STOE), GSAS (Rietveld refinements), PyMca and Fit2D.
• Neutron Experience. Single crystal neutron diffraction at TOPAZ (SNS, ORNL) and MACS (NIST) on
cobaltites and nickelates. Neutron powder diffraction at POWGEN. Rietveld refinements on nuclear
structure and magnetic structure using FullProf, Jana2006 and GSAS.
Selected Peer-Reviewed Papers
• Junjie Zhang,* Yu-Sheng Chen, D. Phelan, H. Zheng, M. R. Norman, J. F. Mitchell. “Stacked Charge
Stripes in the Quasi-2D Trilayer Nickelate La4Ni3O8” Proceedings of the National Academy of
Sciences of the United States of America 2016, 113, 8945-8950. DOI: 10.1073/pnas.1606637113
(Highlights from U.S. Department of Energy, PHYS ORG and Argonne National Laboratory).
• Junjie Zhang,* Hong Zheng, Christos D. Malliakas, Jared M. Allred, Yang Ren, Qing’an Li, Tian-Heng
Han, J. F. Mitchell, “Brownmillerite Ca2Co2O5: Synthesis, Stability, and Re-entrant Single Crystal to
Single Crystal Structural Transitions” Chemistry of Materials 2014, 26, 7172-7182.
DOI: 10.1021/cm503873x
• Junjie Zhang, Zhonghan Zhang, Weiguo Zhang, Qingxin Zheng, Youxuan Sun, Chengqian Zhang,
Xutang Tao,* “Polymorphism of BaTeMo2O9: A New Polar Polymorph and the Phase Transformation”
Chemistry of Materials 2011, 23, 3752-3761. DOI: 10.1021/cm2015143
Manuscripts in Preparation
• Junjie Zhang, D. Phelan,* D. Pajerowski, L. Harriger, J. Rodriguez-Rivera, M. R. Norman, S.
Rosenkranz, J. F. Mitchell. “Spin stripes: Origin of the Anomalous Magnetic Transition in a Square
Planar Nickelate”.
• Junjie Zhang,* J. F. Mitchell, et al. “High pressure crystal growth, crystal structure, and phase
transitions of the Ruddlesden–Popper trilayer Nickelate R4Ni3O10 (R=La, Pr, and Nd)”.
• Junjie Zhang,* J. F. Mitchell, et al. “Coupled charge and spin stripe order in the Ruddlesden–Popper
trilayer Nickelates R4Ni3O10 (R=La, Pr, and Nd)”.
• Hong Zheng, Junjie Zhang, J. F. Mitchell, et al. “Controlled Vapor Crystal Growth of Na4Ir3O8: A 3D
Quantum Spin Liquid Candidate”.
Manuscripts Under Review
• Haoxiang Li, Xiaoqing Zhou, Thomas Nummy, Junjie Zhang, V. Pardo, W. E. Pickett, J. F. Mitchell, D.
S. Dessau. “Fermiology and Electron Dynamics of Trilayer Nickelate (La4Ni3O10)” Nature
Communications.
Curriculum Vitae│Junjie Zhang
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• Nathaniel J. Schreiber; Junjie Zhang; Hong Zheng; J. W. Freeland; Yu-Sheng Chen; J. F Mitchell, D.
Phelan. “Single crystal and structural evolution across the 1st order valence transition in
(Pr1-y)YyCaxCoO3-ð” Journal of Solid State Chemistry.
• Jingjing Zhang, Zheng Yang, Ilya A. Shkrob, Rajeev S. Assary, Siu on Tung, Benjamin Silcox, Wentao
Duan, Junjie Zhang, Chi Cheung Su, Bin Hu, Baofei Pan, Chen Liao, Zhengcheng Zhang, Wei Wang,
Larry A. Curtiss, Levi Thompson, Xiaoliang Wei, and Lu Zhang. “Annulated dialkoxybenzenes as
catholyte materials for nonaqueous redox flow batteries: achieving high chemical stability through
bicyclic substitution” Energy & Environmental Science.
Publication List (Total: 28)
28). Junjie Zhang,* A. S. Botana, J. W. Freeland, D. Phelan, Hong Zheng, V. Pardo, M. R. Norman, J. F.
Mitchell. “Large orbital polarization in a square planar trilayer nickelate” Nature Physics (Accepted)
2017.
27). Junjie Zhang,* Hong Zheng, Yang Ren, J. F. Mitchell. “High pressure floating-zone growth of
perovskite nickelate LaNiO3 single crystals” Crystal Growth Design (Accepted)
DOI: 10.1021/acs.cgd.7b00205.
26). Junjie Zhang,* Yu-Sheng Chen, D. Phelan, H. Zheng, M. R. Norman, J. F. Mitchell. “Stacked Charge
Stripes in the Quasi-2D Trilayer Nickelate La4Ni3O8” Proceedings of the National Academy of
Sciences of the United States of America 2016, 113, 8945-8950. DOI: 10.1073/pnas.1606637113
(Highlights from U.S. Department of Energy, PHYS ORG and Argonne National Laboratory).
25). Zeliang Gao, Xiangxin Tian, Junjie Zhang, Qian Wu, Qingming Lu, Xutang Tao,* “Large-sized crystal
growth and electric-elastic properties of α-BaTeMo2O9 single crystal” Crystal Growth & Design 2015,
15, 759-763. DOI: 10.1021/cg501574e
24). Jinhua Huang, Nasim Azimi, Lei Cheng, I. A. Shkrob, Zheng Xue, Junjie Zhang, N. L. D. Rago, L. A.
Curtiss, K. Amine, Z. C. Zhang, Lu Zhang,* “An organophosphine oxide redox shuttle additive that
delivers long-term overcharge protection for 4 V lithium-ion batteries” Journal of Materials Chemistry A
2015, 3, 10710-10714. DOI: 10.1039/C5TA01326G
23). Baofei Pan, Junjie Zhang, Jinhua Huang, J. T. Vaughey, L. Zhang, S. D. Han, A. K. Burrell, Z. C.
Zhang, C. Liao,* “A Lewis acid-free and phenolate-based magnesium electrolyte for rechargeable
magnesium batteries” Chemical Communications 2015, 51, 6214-6217. DOI: 10.1039/c5cc01225b
(Highlights from Argonne National Laboratory).
22). Junjie Zhang,* Hong Zheng, Christos D. Malliakas, Jared M. Allred, Yang Ren, Qing’an Li, Tian-Heng
Han, J. F. Mitchell, “Brownmillerite Ca2Co2O5: Synthesis, Stability, and Re-entrant Single Crystal to
Single Crystal Structural Transitions” Chemistry of Materials 2014, 26, 7172-7182.
DOI: 10.1021/cm503873x
21). Fen Bai, Qingpu Wang,* Xutang Tao, Ping Li, Xingyu Zhang, Zhaojun Liu, Hongbin Shen, Weixia Lan,
Liang Gao, Zeliang Gao, Junjie Zhang, Jiaxiong Fang. “Eye-safe Raman laser based on BaTeMo2O9
crystal” Applied Physics B Lasers and Optics 2014, 116, 501-505. DOI: 10.1007/s00340-013-5726-5
20). Zeliang Gao, Youxuan Sun, Junjie Zhang, Shanpeng Wang, Xutang Tao,* “Investigations of the
electro-optic behavior of Cs2TeMo3O12 single crystal” Journal of Applied Physics 2014, 116, 043502.
DOI: 10.1063/1.4890975
Curriculum Vitae│Junjie Zhang
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19). Shan-De Liu, Zeliang Gao, Junjie Zhang, Baitao Zhang, Jingliang He, Xutang Tao.* “A millijoule
a-BaTeMo2O9 Raman laser driven by a diode-pumped Nd:YLF laser” Laser Physics 2014, 24, 045808.
DOI: 10.1088/1054-660X/24/4/045808
18). Shande Liu, Junjie Zhang, Zeliang Gao, Lei Wei, Shaojun Zhang, Jingliang He, Xutang Tao,*
“Generation of 1.3 pm and 1.5 μm high-energy Raman radiations in α-BaTeMo2O9 crystals”, Optical
Materials 2014, 36, 760-763. DOI: 10.1016/j.optmat.2013.11.021
17). Xiaoxiao Feng, Junjie Zhang, Zeliang Gao, Shaojun Zhang, Youxuan Sun, Xutang Tao,*
“Investigation of the second-order nonlinear optical properties of Cs2TeMo3O12 single crystal” Applied
Physics Letters 2014, 104, 081912. DOI: 10.1063/1.4866800
16). Shan-De Liu, Zeliang Gao, Junjie Zhang, Baitao Zhang, Jingliang He, Xutang Tao.* “A
a-BaTeMo2O9 Raman shifting driven by a pulsed LD pumped Nd:YAG laser” IEEE Photonics
Technology Letters 2014, 26, 158-161. DOI: 10.1109/LPT.2013.2290799
15). D. S. Yuan, Z. T. Jia, Jian Wang, Zeliang Gao, Junjie Zhang, X.W. Fu, J. Shu, Y. R. Yin, Q. Q. Hu, X. T.
Tao,* “Bulk growth, structure, and characterization of the new monoclinic TbCa4O(BO3)3 crystal”
CrystEngComm 2014, 16, 4008-4015. DOI: 10.1039/C4CE00051J
14). Shutong Zhou, Yan Huang, W. Y. Qiu, Y. L. Li, S. M. He, Junjie Zhang, B. Zhang, X. S. Chen, X. T.
Tao, and W. Lu,* “Effects of structure distortion on optical phonon properties of crystalline β
-BaTeMo2O9—A novel nonlinear optical material: Infrared and Raman spectra as well as
first-principles calculations”, Journal of Applied Physics 2013, 114, 233505. DOI: 10.1063/1.4844555
13). Zeliang Gao, Shan-De Liu, Junjie Zhang, Shaojun Zhang, Weiguo Zhang, Shanpeng Wang,
Jingliang He, Xutang Tao.* “A high efficiency third order Stokes Raman laser operating at 1500 nm
based on a BaTeMo2O9 crystal” Laser Physics Letters 2013, 10, 125403. DOI:
10.1088/1612-2011/10/12/125403
12). Junjie Zhang, Zeliang Gao, Shande Liu, Shaojun Zhang, Xiaoxiao Feng, Peng Zhao, Weiguo
Zhang, Jingliang He, and Xutang Tao,* “Simultaneous dual-wavelength operation of β-BaTeMo2O9
Raman laser at 1320 and 1500 nm” Applied Physics Express 2013, 6, 072702. DOI:
10.7567/APEX.6.072702
11). Liang Gao, Qingpu Wang,* Xutang Tao, Ping Li, Xingyu Zhang, Zhaojun Liu, Xiaohan Chen, Fen Bai,
Weixia Lan, Hongbin Shen, Zeliang Gao, Junjie Zhang, and Jiaxiong Fang. “Passively Q-Switched
Intracavity BaTeMo2O9 Raman Laser” Applied Physics Express 2013, 6, 052703. DOI:
10.7567/APEX.6.052703
10). Zeliang Gao, Shande Liu, Shaojun Zhang, Junjie Zhang, Weiguo Zhang, Shanpeng Wang, Jingliang
He, Xutang Tao,* “Self-frequency-doubled Raman laser emitting at 589 nm based on the monoclinic
single crystal BaTeBa2O9”, Optics Express 2013, 21, 7821-7827. DOI: 10.1364/OE.21.007821
9). Shande Liu, Junjie Zhang, Zeliang Gao, Shaojun Zhang, Jingliang He, Xutang Tao,* “Efficient Raman
laser based on bulk α-BaTeMo2O9 crystals”, Applied Physics Express 2013, 6, 042401. DOI:
10.7567/APEX.6.042401
8). Zhonghan Zhang, Xutang Tao,* Junjie Zhang, Youxuan Sun, Chengqian Zhang and Bo Li, “Synthesis,
crystal growth, and characterization of the orthorhombic BaTeW2O9: a new polymorph of BaTeW2O9”,
CrystEngComm 2013, 15, 10197. DOI: 10.1039/C3CE41272E
7). Junjie Zhang, Zhonghan Zhang, Youxuan Sun, Chengqian Zhang, Xutang Tao,* “Anisotropic Thermal
Curriculum Vitae│Junjie Zhang
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Properties of the Polar Crystal Cs2TeMo3O12” Journal of Solid State Chemistry 2012, 195, 120-124.
DOI:10.1016/j.jssc.2011.12.022
6). Junjie Zhang, Zeliang Gao, Xin Yin, Zhonghan Zhang, Youxuan Sun, Xutang Tao,* “Investigation of
the dielectric, elastic, and piezoelectric properties of Cs2TeMo3O12 crystals” Applied Physics Letters
2012, 101, 062901. DOI: 10.1063/1.4742735
5). Junjie Zhang, Zhonghan Zhang, Youxuan Sun, Chengqian Zhang, Shaojun Zhang, Yang Liu, Xutang
Tao,* “MgTeMoO6: A Neutral Layered Material Showing Strong Second-harmonic Generation” Journal
of Materials Chemistry 2012, 22, 9921-9927. DOI: 10.1039/C2JM30953J
4). Junjie Zhang, Zhonghan Zhang, Xutang Tao,* “Research advances of novel nonlinear optical
crystals based on second-order Jahn-Teller effects (SOJT)” Journal of Shandong University (Natural
Science) 2011, 46, 99-120. (in Chinese)
3). Junjie Zhang, Zhonghan Zhang, Weiguo Zhang, Qingxin Zheng, Youxuan Sun, Chengqian Zhang,
Xutang Tao,* “Polymorphism of BaTeMo2O9: A New Polar Polymorph and the Phase Transformation”
Chemistry of Materials 2011, 23, 3752-3761. DOI: 10.1021/cm2015143
2). Junjie Zhang, Xutang Tao,* Youxuan Sun, Zhonghan Zhang, Chengqian Zhang, Zeliang Gao,
Haibing Xia, Shengqing Xia, “Top-Seeded Solution Growth, Morphology, and Properties of a Polar
Crystal Cs2TeMo3O12” Crystal Growth & Design 2011, 11, 1863-1868. DOI: 10.1021/cg200050g
1). Junjie Zhang, Zhonghan Zhang, Youxuan Sun, Chengqian Zhang, Xutang Tao,* “Bulk crystal growth
and characterization of a new polar polymorph of BaTeMo2O9: α-BaTeMo2O9” CrystEngComm 2011, 13,
6985-6990. (Highlighted in CrystEngComm blog). DOI: 10.1039/C1CE05922J
Patents
• ZL 201010581219.7 (Chinese patent, Issued)
Title: “Cs2TeMo3O12 single crystals, its flux growth and applications”
Assignee: Shandong University
Inventors: Xutang Tao, Junjie Zhang, Youxuan Sun, Chengqian Zhang, Minhua Jiang
• ZL 201010297346.4 (Chinese patent, Issued)
Title: “High-temperature phase of BaTeMo2O9, its flux growth and applications”
Assignee: Shandong University
Inventors: Xutang Tao, Junjie Zhang, Weiguo Zhang, Youxuan Sun, Chengqian Zhang, Minhua Jiang
• ZL 201310289259.8 (Chinese patent, Pending)
Title: “Polarized prism based on α-BaTeMo2O9 crystals”
Assignee: Shandong University
Inventors: Xutang Tao, Zeliang Gao, Qian Wu, Junjie Zhang
Conferences/Meetings (4 seminar talks, 6 orals and 5 posters)
16). Junjie Zhang, A. S. Botana, J. W. Freeland, D. Phelan, Hong Zheng, V. Pardo, M. R. Norman, J. F.
Mitchell, “Mimicking cuprates: large orbital polarization in square-planar nickelates” Oral presentation,
APS March Meeting, 03/2017, New Orleans, Louisiana, USA
15). Junjie Zhang, “Square-Planar Trilayer Nickelates: A Cuprate Analogue?” Seminar, Oak Ridge
National Laboratory, 11/2016
14). Junjie Zhang, “Square-Planar Trilayer Nickelates: A Cuprate Analogue?” Seminar, Brookhaven
Curriculum Vitae│Junjie Zhang
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National Laboratory, 10/2016
13). Junjie Zhang, “Charge Order in Trilayer Nickelates” Seminar, University of Illinois at
Urbana-Champaign, 05/2016
12). Junjie Zhang, Yu-Sheng Chen, Daniel Phelan, Hong Zheng, M. R. Norman, J. F. Mitchell, “Single
crystal preparation and long-range charge fluctuations in the square-planar nickelate La4Ni3O8” Oral
presentation, APS March Meeting, 03/2016, Baltimore, MD, USA
11). Junjie Zhang, Hong Zheng, Christos D. Malliakas, Jared M. Allred, Yang Ren, Qing’an Li, Tian-Heng
Han, J. F. Mitchell, “Brownmillerite Ca2Co2O5: Synthesis, Stability, and Re-entrant Single Crystal to
Single Crystal Structural Transitions” Oral presentation, APS March Meeting, 03/2015, San Antonio, TX,
USA
10). Junjie Zhang, H. Zheng; C. D. Malliakas; J. M. Allred; Y. Ren; Q. Li; T. Han and J. F. Mitchell,
“Brownmillerite Ca2Co2O5: Re-entrant Structural Transitions and Canted Antiferromagnetism”, ICMR
Summer School and Workshop on Advances in oxide materials: Preparation, properties, performance.
Poster, 08/2014, University of California, Santa Barbara.
9). Junjie Zhang, 63rd Lindau Nobel Laureate Meeting, 07/2013, Lindau, Germany
8). Junjie Zhang, Xutang Tao,* “Synthesis, Crystal Growth, Characterization and Structure-property
Relationships of Alkali/Alkaline-earth Metal Molybdenum Tellurites”, “Hai You” Seminar, 12/2012, Jinan,
China
7). Junjie Zhang, Xutang Tao,* Youxuan Sun, Chengqian Zhang, “Top-seeded solution growth and
Characterization of the multifunctional crystal Cs2TeMo3O12”, Oral presentation, 16th Chinese
Conference on Crystal Growth and Materials (CCCG-16), 10/2012, Hefei, China
6). Junjie Zhang, Xutang Tao,* Zhonghan Zhang, Youxuan Sun, Chengqian Zhang, “Synthesis, Growth
and Characterization of the Telluromolybdate Nonlinear Optical Crystals”, Oral presentation, The
Conference on Technology for Advanced Crystal Growth Equipments, 07/2012, Weihai, Shandong,
China
5). Junjie Zhang, Xutang Tao,* Zhonghan Zhang, Youxuan Sun, Chengqian Zhang, “Growth and
Characterization of the Polar Crystal Cs2TeMo3O12”, Oral presentation, 2012 Chinese Materials
Conference Section H: Functional Crystal Materials, 07/2012, Taiyuan, Shanxi, China
4). Junjie Zhang, Zhonghan Zhang, Weiguo Zhang, Youxuan Sun, Chengqian Zhang, Xutang Tao,*
“Synthesis, Crystal Growth of α-BaTeMo2O9 and the relationship between α- and β-BaTeMo2O9”,
Poster, The 12th Conference on Solid State Chemistry and Inorganic Synthesis (CSSCIS), 06/2012,
Qingdao, Shandong, China
3). Junjie Zhang, Xutang Tao,* Youxuan Sun, Chengqian Zhang, “Top-seeded solution growth,
morphology, and properties of a polar crystal Cs2TeMo3O12”, Poster, The 18th American Conference on
Crystal Growth(ACCGE-18), 08/2011, Monterey, California, United States
2). Junjie Zhang, Weiguo Zhang, Xutang Tao,* Youxuan Sun, Chengqian Zhang, “Growth of high quality
BaTeMo2O9 single crystals”, Poster, The 16th International Conference on Crystal Growth (ICCG-16),
08/2010, Beijing, China
1). Weiguo Zhang, Junjie Zhang, Xutang Tao,* Chengqian Zhang, “Micro-morphology and Growth
Mechanism of the BaTeMo2O9 crystal”, Poster, The 15th Chinese Conference on Crystal Growth and
Materials (CCCG-15), 11/2009, Ningbo, China
Curriculum Vitae│Junjie Zhang
Page 8 of 11
Established Collaborators
1). Argonne National Laboratory
• D. Phelan, Materials Science Division
• H. Zheng, Materials Science Division
• A. S. Botana, Materials Science Division
• S. Rosenkranz, Materials Science Division
• M. R. Norman, Materials Science Division
• J. W. Freeland, Beamline 4-ID-C, Advanced Photon Source
• S. Lapidus, Beamline 11-BM, Advanced Photon Source
• Y. Ren, Beamline 11-ID-C, Advanced Photon Source
• E. Karapetrova, Beamline 33-BM-C, Advanced Photon Source
• A. H. Said, Beamline 30-ID-C, Advanced Photon Source
2). Beyond Argonne National Laboratory
• Omar H. Chmaissem, Department of Physics, Northern Illinois University
• W. E. Pickett, Department of Physics, University of California – Davis
• N. Curro, Department of Physics, University of California – Davis
• C. Leighton, Department of Chemical Engineering and Materials Science, University of
Minnesota
• D. Dessau, Department of Physics, University of Colorado Boulder
• Y.-S. Chen, The University of Chicago/Beamline 15-ID-B, Advanced Photon Source
• S. L. Cooper, Department of Physics, University of Illinois at Urbana–Champaign
• P. Abbamonte, Department of Physics, University of Illinois at Urbana–Champaign
• J. M. Rondinelli, Department of Materials Science and Engineering, Northwestern
University
• V. Pardo, Department of Applied Physics, Universidade de Santiago de Compostela, Spain
• A. Huq, POWGEN, Spallation Neutron Source, Oak Ridge National Laboratory
• Xiaoping Wang, TOPAZ, Spallation Neutron Source, Oak Ridge National Laboratory
• J. A. Rodriguez, Multi-Axis Crystal Spectrometer (MACS), NCNR-NIST
• Yiming Qiu, Multi-Axis Crystal Spectrometer (MACS), NCNR-NIST
• Mark Dean, Department of Condensed Matter Physics and Materials Science, Brookhaven
National Laboratory
• Jaewook Kim, Department of Physics and Astronomy, Rutgers University
Curriculum Vitae│Junjie Zhang
Page 9 of 11
Research Accomplishments
In my PhD research, I focused on designing and growing new nonlinear optical single crystals, studying
their crystal structure and physical properties such as second-harmonic generation. My study discovered
two materials that have potential applications. During my postdoctoral research, I mainly work on cobaltites
and nickelates, emphasizing the relationships between crystal structure and electronic and magnetic
properties. My accomplishments include discoveries of a new Brownmillerite cobaltite with unprecedented
structural and magnetic transitions, charge superlattice peaks that challenge the standing theory of charge
density wave (CDW) in R4Ni3O10 (R=La, Pr), charge stripes that explain the ground state of La4Ni3O8, and
large orbital polarization in eg states that demonstrate a remarkable analogy between R4Ni3O8 (R=La, Pr)
and cuprates.
I. Nonlinear optical materials. Mid-infrared laser (3-5 μm in
wavelengths) has important applications in the field of medicine,
atmospheric telecommunication, spectroscopy, etc. However,
generating such wavelengths remains an open problem due to the
lack of efficient NLO crystals.1 My approach was to explore new
materials using noncentrosymmetric building blocks, including
octahedrally coordinated d0 transition metal ions (e.g., Mo6+) and
cations with stereochemically active lone pairs (e.g., Te4+). I
successfully synthesized α-BaTeMo2O9, Cs2TeMo3O12 and
MgTeMoO6, and grew single crystals with dimensions up to
50×42×30 mm3 using the top-seeded solution growth method (see
Fig. 1). My study demonstrates that Cs2TeMo3O12 is a promising mid-infrared NLO crystal. By calculating
structural distortions, we explained the large difference in the second-harmonic generation efficiency
between α- and β-BaTeMo2O9. Additionally, we realized a high efficient laser operating at 1178 nm using
α-BaTeMo2O9 single crystals. The results have been published in Chem. Mater., Cryst. Growth. Des.,
CrystEngComm, Appl. Phys. Lett., etc.
II. Brownmillerite calcium cobaltite. Brownmillerite oxides2 belong to the oxygen deficient perovskites,
which have attracted considerable attention due to their interesting properties such as superconductivity,
fast-ion conductivity and metal-insulator transitions. I synthesized single crystals of Brownmillerite
Ca2Co2O5 for the first time. We found Ca2Co2O5 undergoes a sequence of first-order structural transitions
that is unprecedented among brownmillerites, broadening the family of space groups available to these
materials and challenging current approaches2 for sorting the myriad variants of brownmillerite structures.
These results have been published in Chem. Mater.
III. Ruddlesden-Popper R4Ni3O10 (R=La, Pr). Two hidden one-dimensional Fermi surfaces (nesting
vector of q=0.3a* or 0.3b*) were found in R4Ni3O10(R=La, Pr) by Seo et al.3 based on tight-binding band
structure calculations, leading them to speculate that CDW instabilities are responsible for their resistivity
and heat capacity anomalies. Attempts to validate this theory on powder samples were inconclusive.4
Recently, I have grown bulk single crystals of R4Ni3O10(R=La, Pr) for the first time using the high pressure
floating zone furnace. Using synchrotron x-ray single-crystal diffraction, we discovered superlattice peaks
in La4Ni3O10 and Pr4Ni3O10 below their transitions, providing first existence of charge order in these
Fig. 1. As grown α-BaTeMo2O9 single
crystal.
Curriculum Vitae│Junjie Zhang
Page 10 of 11
nickelates. However, the wavevectors (q~0.24b* for La4Ni3O10 and q~0.21b* for Pr4Ni3O10) are
substantially different from the predicted ones, challenging the standing CDW theory.
IV. T'-R4Ni3O8 (R=La, Pr). The quasi-2D
nickelate R4Ni3O8 (R=La, Pr, R438),
consisting of trilayer networks of square
planar Ni ions,5 are members of the
so-called T' family. The origin of the phase
transition and the electronic structure of
R438 remain elusive.6-8 We show using
synchrotron x-ray diffraction on La438
single crystals that the transition is
associated with a real space ordering of
charge into a quasi-2D charge stripe ground
state (see Fig. 2). The charge superlattice
propagation vector, q=(⅔, 0, 1),
corresponds with that found in the related
⅓-hole doped single layer R-P nickelate,
La5/3Sr1/3NiO4 (Ni2.33+) with orientation at 45°
to the Ni-O bonds. The charge stripes in
La-438 are weakly correlated along c to form a staggered ABAB stacking that minimizes the Coulomb
repulsion among stripes. Surprisingly, however, we find that the charge stripes within each trilayer of
La-438 are stacked in phase from one layer to the next, at odds with any simple Coulomb repulsion
argument. These results have been published at PNAS.
High temperature cuprate superconductivity remains a defining problem in condensed matter physics.
Among myriad approaches to addressing this problem has been the study of alternative transition metal
oxides with similar structures and 3d electron count that are suggested as proxies for cuprate physics.
None of these analogs has been superconducting, and few are even metallic. We report that the low-valent,
quasi-two-dimensional trilayer compound Pr4Ni3O8 avoids a charge-stripe ordered phase previously
reported for La4Ni3O8, leading to a metallic ground state. X-ray absorption spectroscopy shows that
metallic Pr4Ni3O8 exhibits a low-spin configuration with significant orbital polarization and
pronounced dx2-y
2 character in the unoccupied states above the Fermi energy, a hallmark of the cuprate
superconductors. DFT calculations corroborate this finding, and reveal that the dx2-y
2 orbital dominates the
near-Ef occupied states as well. Belonging to a regime of 3d electron count found for hole-doped cuprates,
Pr4Ni3O8 thus represents one of the closest analogies to cuprates yet reported and a singularly promising
candidate for high-Tc superconductivity if electron doping could be achieved. A manuscript on this has
been accepted by Nature Physics.
Fig. 2. Observation of superlattice peaks (highlighted in circles)
in La4Ni3O8 and the real-space charge stripe model. Note yellow
(blue) spheres represent areas of higher (lower) valence than
1.33+. Red spheres are oxygen atoms.
Curriculum Vitae│Junjie Zhang
Page 11 of 11
Reference
1. Ebrahim-Zadeh M, et al. eds (2008) Mid-Infrared Coherent Sources and Applications (Springer
Dordrecht, The Netherlands), pp 347-375.
2. Parsons TG, et al. (2009) Chem. Mater. 21(22):5527-5538.
3. Seo DK, et al. (1996) Inorg. Chem. 35(22):6396-6400.
4. Ling CD, et al. (2000) J. Solid State Chem. 152(2):517-525.
5. Poltavets VV, et al. (2007) Inorg. Chem. 46(25):10887-10891.
6. Hua W (2013) New J. Phys. 15(2):023038.
7. Pardo V, et al. (2012) Phys. Rev. B 85(4):045111.
8. Poltavets VV, et al. (2010) Phys. Rev. Lett. 104(20):206403.
