Donor binding energies and spin-orbit coupling in a spherical quantum dot

被引：78
|
作者：
Bella, RSD
Navaneethakrishnan, K [1 ]
机构：
[1] Arulmigu Kalasalingam Coll Engn, Dept Phys, Krishnan Koil 626190, Srivilliputhur, India
[2] Madurai Kamaraj Univ, Sch Phys, Madurai 625021, Tamil Nadu, India
来源：
SOLID STATE COMMUNICATIONS | 2004年 / 130卷 / 11期
关键词：
quantum dot; donor binding; spin-orbit coupling;
D O I：
10.1016/j.ssc.2004.02.053
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The ground state and a few excited state energies of a hydrogenic donor in a spherical quantum dot (GaAs in a GaAlAs matrix) are computed. While the 1s and the 2s-state energies behave normally for dots of all radii, the 2p(0) and 2p(+/-) states are unbound for most of the radii of interest. It is predicted that a semiconductor quantum dot with a hydrogenic donor will exhibit photoconductivity for a low threshold wavelength similar to12 mum. The spin-orbit coupling gives a contribution of the order of 10(-5) meV for both 2p(0) and 2p(+/-) states. (C) 2004 Published by Elsevier Ltd.
引用
收藏
页码：773 / 776
页数：4
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