Open AccessAnisotropy and isotropy of hole effective mass of strained Ge
Author(s) -
Xianying Dai,
Yang Cheng,
Jianjun Song,
Heming Zhang,
Hao Yue,
Zheng Ruo-Chuan
Publication year - 2012
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.61.237102
Subject(s) - isotropy , effective mass (spring–mass system) , anisotropy , valence band , frame work , physics , condensed matter physics , valence (chemistry) , wave vector , band gap , work (physics) , materials science , optics , quantum mechanics , theoretical physics
In this paper, the hole effective mass along arbitrarily k wavevector direction and the hole isotropic effective masses in strained Ge/(001)(101)(111)Si1-xGex are obtained with in the frame work of kp theory. It is found that the hole effective mass of the top valence band along [010] wave vector decreases obviously with stress increasing and its absolute value is smallest. The hole effective mass of the second valence band tends to gently decrease with stress increasing, and is not significant in magnitude. Compared with the existing isotropic effective quality, the result obtained in this paper is proved to be correct.