Inelastic light scattering by intrasubband spin-density excitations in GaAs-AlGaAs quantum wells with balanced Bychkov-Rashba and Dresselhaus spin-orbit interaction: Quantitative determination of the spin-orbit field

URN to cite this document:

urn:nbn:de:bvb:355-epub-416062 Copy

DOI to cite this document:

10.5283/epub.41606 Copy

Gelfert, Sven ; Frankerl, C. ; Reichl, C. ; Schuh, Dieter ; Salis, G. ; Wegscheider, Werner ; Bougeard, Dominique ; Korn, Tobias ; Schüller, Christian

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Date of publication of this fulltext: 14 Feb 2020 12:45

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Details

Item type:	Article
Journal or Publication Title:	Phys. Rev. B
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
Volume:	101
Number of Issue or Book Chapter:	035427
Date:	29 January 2020
Institutions:	Physics > Institute of Experimental and Applied Physics Physics > Institute of Experimental and Applied Physics > Chair Professor Huber > Group Dominique Bougeard Physics > Institute of Experimental and Applied Physics > Chair Professor Lupton > Group Christian Schüller
Projects:	SFB 1277: Emergente relativistische Effekte in der Kondensierten Materie: Von grundlegenden Aspekten zu elektronischer Funktionalität
Identification Number:	Value Type 10.1103/PhysRevB.101.035427 DOI
Keywords:	SINGLE-PARTICLE EXCITATIONS; ELECTRON G-FACTOR; RAMAN-SCATTERING; ANISOTROPY; GAS;
Dewey Decimal Classification:	500 Science > 530 Physics
Status:	Published
Refereed:	Yes, this version has been refereed
Created at the University of Regensburg:	Partially
Item ID:	41606

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Abstract

Inelastic light scattering experiments on low-energy intrasubband spin-density excitations (SDEs) are performed in (001)-grown modulation-doped GaAs-AlGaAs single quantum wells in in-plane external magnetic fields. The investigated samples possess balanced linear Bychkov-Rashba (alpha) and Dresselhaus (beta) spin-orbit strengths in two different configurations, alpha = beta and alpha = -beta Both ...

Abstract

Inelastic light scattering experiments on low-energy intrasubband spin-density excitations (SDEs) are performed in (001)-grown modulation-doped GaAs-AlGaAs single quantum wells in in-plane external magnetic fields. The investigated samples possess balanced linear Bychkov-Rashba (alpha) and Dresselhaus (beta) spin-orbit strengths in two different configurations, alpha = beta and alpha = -beta Both configurations lead to an extreme anisotropy of the spin splitting of the conduction band, where the in-plane directions of maximum spin splitting for both configurations are perpendicular to each other. The spin splitting asymmetry can be directly detected via the SDE by breaking of the time-reversal symmetry due to transfer of a momentum q in the quantum-well plane. In addition, the application of an in-plane magnetic field B-ext perpendicular to q allows us to modulate the effective magnetic field. Via a numerical line-shape analysis of the experimental SDE spectra, we determine the relevant parameters of the samples. We find that the linear spin-orbit strength vertical bar alpha vertical bar = beta is comparable for both samples, while the electron g factors are markedly different. Furthermore, we experimentally quantify the values of the maximum internal spin-orbit fields, which are as high as B-so similar to 18 T for both samples.

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Metadata last modified: 29 Sep 2021 07:41

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