Absolute negative conductivity and zero-resistance states in two-dimensional electron systems: A plausible scenario

Ryzhii, V. I.; Chaplik, A. V.; Suris, R. A.

doi:10.1134/1.1825124

Cited by 34 publications

(27 citation statements)

References 17 publications

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“…III.A) show at sufficiently high T an exponential suppression of the oscillation amplitude as T is increased (Hatke et al, 2009c;Wiedmann et al, 2010b). This effect can be explained in terms of a T -dependent renormalization of the DOS by electron-electron interactions (Chaplik, 1971;Dmitriev et al, 2009b;Ryzhii et al, 2004). Specifically, the quantum scattering rate τ −1 q that enters the DOS ν(ε) = 1 − 2δ cos(2πε/ω c ) via the Dingle factor δ should be substituted bỹ…”

Section: Inelastic and Displacement Mechanismsmentioning

confidence: 99%

Nonequilibrium phenomena in high Landau levels

et al. 2012

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Developments in the physics of 2D electron systems during the last decade revealed a new class of nonequilibrium phenomena in the presence of a moderately strong magnetic field. The hallmark of these phenomena is magnetoresistance oscillations generated by the external forces that drive the electron system out of equilibrium. The rich set of dramatic phenomena of this kind, discovered in high mobility semiconductor nanostructures, includes, in particular, microwave radiation-induced resistance oscillations and zero-resistance states, as well as Hall field-induced resistance oscillations and associated zero-differential resistance states. The experimental manifestations of these phenomena and the unified theoretical framework for describing them in terms of a quantum kinetic equation are reviewed. This survey also contains a thorough discussion of the magnetotransport properties of 2D electrons in the linear-response regime, as well as an outlook on future directions, including related nonequilibrium phenomena in other 2D electron systems.

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Section: Inelastic and Displacement Mechanismsmentioning

confidence: 99%

Nonequilibrium phenomena in high Landau levels

et al. 2012

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“…Unlike the explanation of the ZRS, so far there has been no common agreement as to the microscopic origin of the OPC. The most frequently studied mechanism 32,33,[36][37][38][39]44,45,47,48,[55][56][57][61][62][63][64][65]67 of the OPC, suggested long ago in Ref. 32, implies that the oscillations occur due to complex scattering processes in which electrons simultaneously are scattered off impurities, absorb (emit) microwave quanta, and are displaced along the applied dc electric field.…”

Section: Introductionmentioning

confidence: 99%

Microwave photoconductivity of a two-dimensional electron gas: Mechanisms and their interplay at high radiation power

2007

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We develop a systematic theory of microwave-induced oscillations in the magnetoresistivity of a two-dimensional electron gas, focusing on the regime of strongly overlapping Landau levels. At linear order in microwave power, two novel mechanisms of the oscillations ("quadrupole" and "photovoltaic") are identified, in addition to those studied before ("displacement" and "inelastic"). The quadrupole and photovoltaic mechanisms are shown to be the only ones that give rise to oscillations in the nondiagonal part of the photoconductivity tensor. In the diagonal part, the inelastic contribution dominates at moderate microwave power, while at elevated power the other mechanisms become relevant. We demonstrate the crucial role of feedback effects, which lead to a strong interplay of the four mechanisms in the nonlinear photoresponse and yield, in particular, a nonmonotonic power dependence of the photoconductivity, narrowing of the magnetoresonances, and a nontrivial structure of the Hall photoresponse. At ultrahigh power, all effects related to the Landau quantization decay due to a combination of the feedback and multiphoton effects, restoring the classical Drude conductivity.

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“…in (T ) is the "total" quantum scattering rate including contributions from both the temperature (T ) independent disorder and T -dependent electronelectron scattering (τ in , respectively) to the Landau level broadening 25,29 . Equation (1), applicable in the regime of low power, P ≪ 1, and overlapping Landau levels, λ ≪ 1, well describes MIRO measured in many experiments 14 .…”

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confidence: 99%

Fine structure of high-power microwave-induced resistance oscillations

et al. 2017

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We report on observation of a fine structure of microwave-induced resistance oscillations in an ultra-clean two-dimensional electron gas. This fine structure is manifested by multiple secondary sharp extrema, residing beside the primary ones, which emerge at high radiation power. Theoretical considerations reveal that this fine structure originates from multiphoton-assisted scattering off short-range impurities. Unique properties of the fine structure allow us to access all experimental parameters, including microwave power, and to separate different contributions to photoresistance. Furthermore, we show that the fine structure offers a convenient means to quantitatively assess the correlation properties of the disorder potential in high-quality systems, allowing separation of short-range and long-range disorder contributions to the electron mobility.

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Absolute negative conductivity and zero-resistance states in two-dimensional electron systems: A plausible scenario

Cited by 34 publications

References 17 publications

Nonequilibrium phenomena in high Landau levels

Nonequilibrium phenomena in high Landau levels

Microwave photoconductivity of a two-dimensional electron gas: Mechanisms and their interplay at high radiation power

Fine structure of high-power microwave-induced resistance oscillations

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