Spin-orbit excitations of quantum wells

被引：5

作者：

Ambrosetti, A. ^{[1
]}

Escartin, J. M. ^{[2
,3
]}

Lipparini, E. ^{[4
,5
]}

Pederiva, F. ^{[4
,5
]}

机构：

[1] Univ Padua, Dipartimento Fis G Galilei, Padua, Italy

[2] Univ Barcelona, Fac Fis, Dept ECM, E-08028 Barcelona, Spain

[3] Univ Barcelona, IN2UB, E-08028 Barcelona, Spain

[4] Univ Trent, Dipartimento Fis, I-38050 Povo, Trento, Italy

[5] Grp Collegato Trento, Ist Nazl Fis Nucl, Trento, Italy

来源：

EPL | 2011年 / 94卷 / 02期

关键词：

MAGNETIC-FIELD;

D O I：

10.1209/0295-5075/94/27004

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Spin-orbit effects on the photoabsorption of a quantum well are discussed by means of a sum rules approach. We show that while the strength of the excitation is zero when the spin-orbit coupling is neglected, the inclusion of the spin-orbit interaction gives rise to a nonzero strength and mean excitation energy in the far-infrared region. A simple expression for these quantities up to the second order in the Rashba interaction is derived. Modifications of the results due to the Dresselhaus spin-orbit term are discussed. The effect of two-body Coulomb interaction is then studied by means of a Quantum Monte Carlo calculation, showing that electron-electron correlations induce only a small deviation from the independent particle model result. Copyright (C) EPLA, 2011

引用

页数：6

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