Parallel magnetic-field tuning of valley splitting in AlAs two-dimensional electrons

T. Gokmen; Medini Padmanabhan; O. Gunawan; Y. P. Shkolnikov; K. Vakili; E. P. De Poortere; M. Shayegan

doi:10.1103/PhysRevB.78.233306

Parallel magnetic-field tuning of valley splitting in AlAs two-dimensional electrons

T. Gokmen, Medini Padmanabhan, O. Gunawan, Y. P. Shkolnikov, K. Vakili, E. P. De Poortere, M. Shayegan

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

We demonstrate that, in a quasi-two-dimensional electron system confined to an AlAs quantum well and occupying two conduction-band minima (valleys), a parallel magnetic field can couple to the electrons' orbital motion and tune the energies of the two valleys by different amounts. The measured density imbalance between the two valleys, which is a measure of the valley susceptibility with respect to parallel magnetic field, is enhanced compared to the predictions of noninteracting calculations, reflecting the role of electron-electron interaction.

Original language	English (US)
Article number	233306
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	78
Issue number	23
DOIs	https://doi.org/10.1103/PhysRevB.78.233306
State	Published - Dec 1 2008

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.78.233306

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abstract = "We demonstrate that, in a quasi-two-dimensional electron system confined to an AlAs quantum well and occupying two conduction-band minima (valleys), a parallel magnetic field can couple to the electrons' orbital motion and tune the energies of the two valleys by different amounts. The measured density imbalance between the two valleys, which is a measure of the valley susceptibility with respect to parallel magnetic field, is enhanced compared to the predictions of noninteracting calculations, reflecting the role of electron-electron interaction.",

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AU - Gokmen, T.

AU - Padmanabhan, Medini

AU - Gunawan, O.

AU - Shkolnikov, Y. P.

AU - Vakili, K.

AU - De Poortere, E. P.

AU - Shayegan, M.

PY - 2008/12/1

Y1 - 2008/12/1

N2 - We demonstrate that, in a quasi-two-dimensional electron system confined to an AlAs quantum well and occupying two conduction-band minima (valleys), a parallel magnetic field can couple to the electrons' orbital motion and tune the energies of the two valleys by different amounts. The measured density imbalance between the two valleys, which is a measure of the valley susceptibility with respect to parallel magnetic field, is enhanced compared to the predictions of noninteracting calculations, reflecting the role of electron-electron interaction.

AB - We demonstrate that, in a quasi-two-dimensional electron system confined to an AlAs quantum well and occupying two conduction-band minima (valleys), a parallel magnetic field can couple to the electrons' orbital motion and tune the energies of the two valleys by different amounts. The measured density imbalance between the two valleys, which is a measure of the valley susceptibility with respect to parallel magnetic field, is enhanced compared to the predictions of noninteracting calculations, reflecting the role of electron-electron interaction.

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JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

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ER -

Parallel magnetic-field tuning of valley splitting in AlAs two-dimensional electrons

Abstract

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