Quantum and classical surface-acoustic-wave-induced magnetoresistance oscillations in a two-dimensional electron gas

Physics

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https://doi.org/10.1103/PhysRevB.71.195420
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Keywords

two-dimensional electron gas, surface acoustic waves, magnetoresistance, acoustoelectric effects, cyclotron resonance

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Quantum and classical surface-acoustic-wave-induced magnetoresistance oscillations in a two-dimensional electron gas. / Kennett, M. P.; Robinson, John P.; Cooper, N. R. et al.
In: Physical Review D, Vol. 71, No. 19, 15.05.2005, p. 195420.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Author

Kennett, M. P. ; Robinson, John P. ; Cooper, N. R. et al. / Quantum and classical surface-acoustic-wave-induced magnetoresistance oscillations in a two-dimensional electron gas. In: Physical Review D. 2005 ; Vol. 71, No. 19. pp. 195420.

Bibtex

@article{68a376f49989476ca5bfac605f3ade1d,

title = "Quantum and classical surface-acoustic-wave-induced magnetoresistance oscillations in a two-dimensional electron gas",

abstract = "We study theoretically the geometrical and temporal commensurability oscillations induced in the resistivity of two-dimensional electrons in a perpendicular magnetic field by surface acoustic waves (SAWs). We show that there is a positive anisotropic dynamical classical contribution and an isotropic nonequilibrium quantum contribution to the resistivity. We describe how the commensurability oscillations modulate the resonances in the SAW-induced resistivity at multiples of the cyclotron frequency. We study the effects of both short-range and long-range disorder on the resistivity corrections for both the classical and quantum nonequilibrium cases. We predict that the quantum correction will give rise to zero-resistance states with associated geometrical commensurability oscillations at large SAW amplitude for sufficiently large inelastic scattering times. These zero resistance states are qualitatively similar to those observed under microwave illumination, and their nature depends crucially on whether the disorder is short or long range. Finally, we discuss the implications of our results for current and future experiments on two-dimensional electron gases.",

keywords = "two-dimensional electron gas, surface acoustic waves, magnetoresistance, acoustoelectric effects, cyclotron resonance",

author = "Kennett, {M. P.} and Robinson, {John P.} and Cooper, {N. R.} and Falko, {Vladimir I.}",

year = "2005",

month = may,

day = "15",

doi = "10.1103/PhysRevB.71.195420",

language = "English",

volume = "71",

pages = "195420",

journal = "Physical Review D",

issn = "1550-7998",

publisher = "American Physical Society",

number = "19",

}

RIS

TY - JOUR

T1 - Quantum and classical surface-acoustic-wave-induced magnetoresistance oscillations in a two-dimensional electron gas

AU - Kennett, M. P.

AU - Robinson, John P.

AU - Cooper, N. R.

AU - Falko, Vladimir I.

PY - 2005/5/15

Y1 - 2005/5/15

N2 - We study theoretically the geometrical and temporal commensurability oscillations induced in the resistivity of two-dimensional electrons in a perpendicular magnetic field by surface acoustic waves (SAWs). We show that there is a positive anisotropic dynamical classical contribution and an isotropic nonequilibrium quantum contribution to the resistivity. We describe how the commensurability oscillations modulate the resonances in the SAW-induced resistivity at multiples of the cyclotron frequency. We study the effects of both short-range and long-range disorder on the resistivity corrections for both the classical and quantum nonequilibrium cases. We predict that the quantum correction will give rise to zero-resistance states with associated geometrical commensurability oscillations at large SAW amplitude for sufficiently large inelastic scattering times. These zero resistance states are qualitatively similar to those observed under microwave illumination, and their nature depends crucially on whether the disorder is short or long range. Finally, we discuss the implications of our results for current and future experiments on two-dimensional electron gases.

AB - We study theoretically the geometrical and temporal commensurability oscillations induced in the resistivity of two-dimensional electrons in a perpendicular magnetic field by surface acoustic waves (SAWs). We show that there is a positive anisotropic dynamical classical contribution and an isotropic nonequilibrium quantum contribution to the resistivity. We describe how the commensurability oscillations modulate the resonances in the SAW-induced resistivity at multiples of the cyclotron frequency. We study the effects of both short-range and long-range disorder on the resistivity corrections for both the classical and quantum nonequilibrium cases. We predict that the quantum correction will give rise to zero-resistance states with associated geometrical commensurability oscillations at large SAW amplitude for sufficiently large inelastic scattering times. These zero resistance states are qualitatively similar to those observed under microwave illumination, and their nature depends crucially on whether the disorder is short or long range. Finally, we discuss the implications of our results for current and future experiments on two-dimensional electron gases.

KW - two-dimensional electron gas

KW - surface acoustic waves

KW - magnetoresistance

KW - acoustoelectric effects

KW - cyclotron resonance

U2 - 10.1103/PhysRevB.71.195420

DO - 10.1103/PhysRevB.71.195420

M3 - Journal article

VL - 71

SP - 195420

JO - Physical Review D

JF - Physical Review D

SN - 1550-7998

IS - 19

ER -

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