Wave-vector-dependent exchange interaction and its relevance for the effective exciton mass in Cu2O -: art. no. 045206

被引：34

作者：

Dasbach, G

Fröhlich, D

Klieber, R

Suter, D

Bayer, M

Stolz, H

机构：

[1] Univ Dortmund, Inst Phys, D-44221 Dortmund, Germany

[2] Univ Rostock, Fachbereich Phys, D-18051 Rostock, Germany

来源：

PHYSICAL REVIEW B | 2004年 / 70卷 / 04期

关键词：

D O I：

10.1103/PhysRevB.70.045206

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The wave-vector dependence of electron-hole exchange interaction is investigated. For the yellow 1S exciton in Cu2O the exchange is derived up to the order k(2). The theoretical predictions are verified experimentally by high-resolution absorption experiments. In agreement with theory the fine structure shows a characteristic dependence on the direction of the wave vector. The exchange splitting of the orthoexciton triplet are distinguished from strain-induced perturbations. The exchange gives rise to an isotropic and an anisotropic correction of the effective exciton mass. This can explain the discrepancies in the measurements of the exciton mass in Cu2O.

引用

页码：045206 / 1

页数：11

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