Halbleiterphysik – Übung 2 Kristallstrukturen/MBE

Zincblende lattice – views

1

(100) (111)

(110)

Halbleiterphysik – Übung 2 Kristallstrukturen/MBE

Zincblende lattice – stacking sequence

2

1st plane = A

Halbleiterphysik – Übung 2 Kristallstrukturen/MBE

Zincblende lattice – stacking sequence

3

1st plane = A2nd plane = B

Halbleiterphysik – Übung 2 Kristallstrukturen/MBE

Zincblende lattice – stacking sequence

4

1st plane = A2nd plane = B3rd plane = C

Halbleiterphysik – Übung 2 Kristallstrukturen/MBE

Zincblende lattice – stacking sequence

5

1st plane = A2nd plane = B3rd plane = C4th plane = A…

ABC

Halbleiterphysik – Übung 2 Kristallstrukturen/MBE

Zincblende lattice – cleavage planes

6

for (111) plane: 1 bond/atom for (110) plane: 1 bond/atom

for (100) plane: 2 bonds/atom

Halbleiterphysik – Übung 2 Kristallstrukturen/MBE

Wurzite/Zincblende – Polytypes

7

SiC shows many (more than 200 known) crystal structures in mixed Wurzite (ABCABC…) and Zincblende (ABAB…)Configurations.

The largest unit cell has 254 layers.

“eclipsed”(hexagonal)

“staggered”(cub ic)

Halbleiterphysik – Übung 2 Kristallstrukturen/MBE

MBE - Vacuum

8