Spin-dependent resistivity and quantum Hall ferromagnetism in two-dimensional electrons confined to AlAs quantum wells

K. Vakili; Y. P. Shkolnikov; E. Tutuc; N. C. Bishop; E. P. De Poortere; M. Shayegan

doi:10.1016/j.physe.2006.02.026

Spin-dependent resistivity and quantum Hall ferromagnetism in two-dimensional electrons confined to AlAs quantum wells

K. Vakili, Y. P. Shkolnikov, E. Tutuc, N. C. Bishop, E. P. De Poortere, M. Shayegan

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

3 Scopus citations

Abstract

We observe a strong dependence of the amplitude and field position of longitudinal resistivity (ρ_xx) peaks in the spin-resolved integer quantum Hall regime on the spin orientation of the Landau level (LL) in which the Fermi energy resides. The amplitude of a given peak is maximal when the partially filled LL has the same spin as the lowest LL, and amplitude changes as large as an order of magnitude are observed as the sample is tilted in field. In addition, the field position of both the ρ_xx peaks and plateau-plateau transitions in the Hall resistance shift depending on the spin orientation of the LLs. The spin dependence of the resistivity points to a new explanation for resistivity spikes, associated with first-order quantum Hall ferromagnetic transitions, that occur at the edges of quantum Hall states.

Original language	English (US)
Pages (from-to)	89-92
Number of pages	4
Journal	Physica E: Low-Dimensional Systems and Nanostructures
Volume	34
Issue number	1-2
DOIs	https://doi.org/10.1016/j.physe.2006.02.026
State	Published - Aug 2006

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Atomic and Molecular Physics, and Optics

Keywords

Quantum Hall ferromagnetism
Screening
Spikes
Spin

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10.1016/j.physe.2006.02.026

Cite this

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title = "Spin-dependent resistivity and quantum Hall ferromagnetism in two-dimensional electrons confined to AlAs quantum wells",

abstract = "We observe a strong dependence of the amplitude and field position of longitudinal resistivity (ρxx) peaks in the spin-resolved integer quantum Hall regime on the spin orientation of the Landau level (LL) in which the Fermi energy resides. The amplitude of a given peak is maximal when the partially filled LL has the same spin as the lowest LL, and amplitude changes as large as an order of magnitude are observed as the sample is tilted in field. In addition, the field position of both the ρxx peaks and plateau-plateau transitions in the Hall resistance shift depending on the spin orientation of the LLs. The spin dependence of the resistivity points to a new explanation for resistivity spikes, associated with first-order quantum Hall ferromagnetic transitions, that occur at the edges of quantum Hall states.",

keywords = "Quantum Hall ferromagnetism, Screening, Spikes, Spin",

author = "K. Vakili and Shkolnikov, {Y. P.} and E. Tutuc and Bishop, {N. C.} and {De Poortere}, {E. P.} and M. Shayegan",

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T1 - Spin-dependent resistivity and quantum Hall ferromagnetism in two-dimensional electrons confined to AlAs quantum wells

AU - Vakili, K.

AU - Shkolnikov, Y. P.

AU - Tutuc, E.

AU - Bishop, N. C.

AU - De Poortere, E. P.

AU - Shayegan, M.

PY - 2006/8

Y1 - 2006/8

N2 - We observe a strong dependence of the amplitude and field position of longitudinal resistivity (ρxx) peaks in the spin-resolved integer quantum Hall regime on the spin orientation of the Landau level (LL) in which the Fermi energy resides. The amplitude of a given peak is maximal when the partially filled LL has the same spin as the lowest LL, and amplitude changes as large as an order of magnitude are observed as the sample is tilted in field. In addition, the field position of both the ρxx peaks and plateau-plateau transitions in the Hall resistance shift depending on the spin orientation of the LLs. The spin dependence of the resistivity points to a new explanation for resistivity spikes, associated with first-order quantum Hall ferromagnetic transitions, that occur at the edges of quantum Hall states.

AB - We observe a strong dependence of the amplitude and field position of longitudinal resistivity (ρxx) peaks in the spin-resolved integer quantum Hall regime on the spin orientation of the Landau level (LL) in which the Fermi energy resides. The amplitude of a given peak is maximal when the partially filled LL has the same spin as the lowest LL, and amplitude changes as large as an order of magnitude are observed as the sample is tilted in field. In addition, the field position of both the ρxx peaks and plateau-plateau transitions in the Hall resistance shift depending on the spin orientation of the LLs. The spin dependence of the resistivity points to a new explanation for resistivity spikes, associated with first-order quantum Hall ferromagnetic transitions, that occur at the edges of quantum Hall states.

KW - Quantum Hall ferromagnetism

KW - Screening

KW - Spikes

KW - Spin

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JO - Physica E: Low-Dimensional Systems and Nanostructures

JF - Physica E: Low-Dimensional Systems and Nanostructures

IS - 1-2

ER -

Spin-dependent resistivity and quantum Hall ferromagnetism in two-dimensional electrons confined to AlAs quantum wells

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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