Electron-spin beat susceptibility of excitons in semiconductor quantum wells

Nai-Hang Kwong, Stefan Schumacher, Rudolf Binder

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Recent time-resolved differential transmission and Faraday rotation measurements of long-lived electron-spin coherence in quantum wells displayed intriguing parametric dependencies. For their understanding we formulate a microscopic theory of the optical response of a gas of optically incoherent excitons whose constituent electrons retain spin coherence, under a weak magnetic field applied in the quantum well's plane. We define a spin beat susceptibility and evaluate it in linear order of the exciton density. Our results explain the many-body physics underlying the basic features observed in the experimental measurements.

Original languageEnglish (US)
Article number056405
JournalPhysical Review Letters
Volume103
Issue number5
DOIs
StatePublished - Aug 6 2009

Fingerprint

electron spin
synchronism
excitons
quantum wells
magnetic permeability
Faraday effect
physics
gases
magnetic fields

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Electron-spin beat susceptibility of excitons in semiconductor quantum wells. / Kwong, Nai-Hang; Schumacher, Stefan; Binder, Rudolf.

In: Physical Review Letters, Vol. 103, No. 5, 056405, 06.08.2009.

Research output: Contribution to journalArticle

@article{ffea29b622394bc39f29fdf07061e331,
title = "Electron-spin beat susceptibility of excitons in semiconductor quantum wells",
abstract = "Recent time-resolved differential transmission and Faraday rotation measurements of long-lived electron-spin coherence in quantum wells displayed intriguing parametric dependencies. For their understanding we formulate a microscopic theory of the optical response of a gas of optically incoherent excitons whose constituent electrons retain spin coherence, under a weak magnetic field applied in the quantum well's plane. We define a spin beat susceptibility and evaluate it in linear order of the exciton density. Our results explain the many-body physics underlying the basic features observed in the experimental measurements.",
author = "Nai-Hang Kwong and Stefan Schumacher and Rudolf Binder",
year = "2009",
month = "8",
day = "6",
doi = "10.1103/PhysRevLett.103.056405",
language = "English (US)",
volume = "103",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "5",

}

TY - JOUR

T1 - Electron-spin beat susceptibility of excitons in semiconductor quantum wells

AU - Kwong, Nai-Hang

AU - Schumacher, Stefan

AU - Binder, Rudolf

PY - 2009/8/6

Y1 - 2009/8/6

N2 - Recent time-resolved differential transmission and Faraday rotation measurements of long-lived electron-spin coherence in quantum wells displayed intriguing parametric dependencies. For their understanding we formulate a microscopic theory of the optical response of a gas of optically incoherent excitons whose constituent electrons retain spin coherence, under a weak magnetic field applied in the quantum well's plane. We define a spin beat susceptibility and evaluate it in linear order of the exciton density. Our results explain the many-body physics underlying the basic features observed in the experimental measurements.

AB - Recent time-resolved differential transmission and Faraday rotation measurements of long-lived electron-spin coherence in quantum wells displayed intriguing parametric dependencies. For their understanding we formulate a microscopic theory of the optical response of a gas of optically incoherent excitons whose constituent electrons retain spin coherence, under a weak magnetic field applied in the quantum well's plane. We define a spin beat susceptibility and evaluate it in linear order of the exciton density. Our results explain the many-body physics underlying the basic features observed in the experimental measurements.

UR - http://www.scopus.com/inward/record.url?scp=68749099764&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=68749099764&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.103.056405

DO - 10.1103/PhysRevLett.103.056405

M3 - Article

AN - SCOPUS:68749099764

VL - 103

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 5

M1 - 056405

ER -