Many-particle effects in Ge quantum dots investigated by time-resolved capacitance spectroscopy

被引：43

作者：

Kapteyn, CMA

Lion, M

Heitz, R

Bimberg, D

Miesner, C

Asperger, T

Brunner, K

Abstreiter, G

机构：

[1] Tech Univ Berlin, Inst Festkorperphys, D-10623 Berlin, Germany

[2] Tech Univ Munich, Walter Schottky Inst, D-85748 Garching, Germany

来源：

APPLIED PHYSICS LETTERS | 2000年 / 77卷 / 25期

关键词：

D O I：

10.1063/1.1334651

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Hole emission from self-organized Ge quantum dots with a diameter of similar to 70 nm in a Si matrix is investigated by time-resolved capacitance spectroscopy [deep level transient spectroscopy (DLTS)]. A complex DLTS signal is observed and explained in terms of thermally activated emission from localized many-particle states. In particular, a gradually decreasing activation energy is found with increasing hole population. A qualitative understanding of the DLTS signal and the observed activation energies is achieved in terms of many-particle states determined by quantization and Coulomb charging. (C) 2000 American Institute of Physics. [S0003-6951(00)02952-1].

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页码：4169 / 4171

页数：3

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