Influence of magnetic quantum confined Stark effect on the spin lifetime of indirect excitons

被引：7

作者：

Andreakou, P. ^{[1
]}

Mikhailov, A. V. ^{[1
,2
]}

Cronenberger, S. ^{[1
]}

Scalbert, D. ^{[1
]}

Nalitov, A. ^{[3
]}

Kavokin, A. V. ^{[2
,3
,4
]}

Nawrocki, M. ^{[5
]}

Butov, L. V. ^{[6
]}

Campman, K. L. ^{[7
]}

Gossard, A. C. ^{[7
]}

Vladimirova, M. ^{[1
]}

机构：

[1] Univ Montpellier, CNRS, Lab Charles Coulomb, UMR 5221, F-34095 Montpellier, France

[2] St Petersburg State Univ, Spin Opt Lab, 1 Ulianovskaya, St Petersburg 198504, Russia

[3] Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England

[4] Russian Quantum Ctr, 100 Novaya, Skolkovo 143025, Moscow Region, Russia

[5] Univ Warsaw, Inst Expt Phys, Hoza 69, PL-00681 Warsaw, Poland

[6] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

[7] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA

来源：

PHYSICAL REVIEW B | 2016年 / 93卷 / 11期

关键词：

WELLS; FIELD; GAAS; ABSORPTION; DYNAMICS; HETEROSTRUCTURES; SEMICONDUCTORS; COHERENCE; ELECTRON; EXCHANGE;

D O I：

10.1103/PhysRevB.93.115410

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report on the unusual and counterintuitive behavior of spin lifetime of excitons in coupled semiconductor quantum wells (CQWs) in the presence of in-plane magnetic field. Instead of conventional acceleration of spin relaxation due to the Larmor precession of electron and hole spins, we observe a strong increase of the spin relaxation time at low magnetic fields followed by saturation and decrease at higher fields. We argue that this nonmonotonic spin relaxation dynamics is a fingerprint of the magnetic quantum confined Stark effect. In the presence of electric field along the CQW growth axis, an applied magnetic field efficiently suppresses the exciton spin coherence, due to inhomogeneous broadening of the g-factor distribution.

引用

页数：8

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