Electronic structure of [110] Si‐Ge thin‐layer superlattices
Electronic structure of [110] Si‐Ge thin‐layer superlattices
复制标题
[110]Si-Ge薄层超晶格的电子结构
DOI:
10.1063/1.101100
复制
发表时间:
1989
影响因子:
4
通讯作者:
A. Zunger
中科院分区:
文献类型:
--
作者:
S. Froyen;D. Wood;A. Zunger
First‐principles electronic structure calculations for SinGen superlattices ( for n=4, 6, and 8) grown epitaxially on a (110) Si substrate reveal a nearly direct band gap (to within ≊0.04 eV for n=4) despite the pronounced indirectness of its constituents. This is unlike superlattices grown in the [001] direction which are indirect when grown on Si and quasi‐direct only on substrates with larger lattice constants, e.g., Ge. Transition dipole matrix elements for the lowest energy direct transition vanish for all repeat periods n but are finite for several other new low‐energy transitions.
影响因子:
--
作者:
POLLAK, FH;CARDONA, M
通讯作者:
CARDONA, M