Spatial variation of the two-dimensional electron gas density induced by an increasing Hall electric field

Baskin, Ilya; Ashkinadze, B. M.; Cohen, E.; Belkov, Vassilij; Pfeiffer, L. N.; Umansky, V.

doi:10.1103/physrevb.84.245320

Cited by 2 publications

(3 citation statements)

References 27 publications

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“…Recent direct experiment indicates that gap E 0 between conducting and valence bands of 2D electron systems formed in GaAs quantum wells depends considerably on the electron density n [27]. This observation opens a way to consider the dependence of the energy separation between two subbands ∆ 12 on the electron density as a mechanism leading to the current induced quantum oscillations in magnetic fields B > B c .…”

Section: Model and Discussionmentioning

confidence: 94%

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Intersubband resistance oscillations in crossed electric and magnetic fields

et al. 2012

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Quantum oscillations of nonlinear resistance are investigated in response to electric current and magnetic field applied perpendicular to single GaAs quantum wells with two populated subbands. At small magnetic fields current-induced oscillations appear as Landau-Zener transitions between Landau levels inside the lowest subband. Period of these oscillations is proportional to the magnetic field. At high magnetic fields different kind of quantum oscillations emerges with a period,which is independent of the magnetic field. At a fixed current the oscillations are periodic in inverse magnetic field with a period that is independent of the dc bias. The proposed model considers these oscillations as a result of spatial variations of the energy separation between two subbands induced by the electric current.

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Section: Model and Discussionmentioning

confidence: 94%

“…Indeed the experiment Ref. [27] demonstrated about one percent change of the gap E 0 at a Hall voltage V H =75 (mV) in magnetic field B=0.3 (T). The Hall voltage is comparable with the one observed in our experiment: V H ≈ 50 mV at B=0.35 (T) and J=4 (A/m).…”

Section: Model and Discussionmentioning

confidence: 99%

Intersubband resistance oscillations in crossed electric and magnetic fields

et al. 2012

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“…We note that this conclusion is in accord with recent experiments on nonlinear properties of highly mobile electrons. 29,30 Below we present obtained results.…”

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Quantum oscillations of nonlinear response in electron systems with variable density

Dietrich

Byrnes

Vitkalov

et al. 2013

Journal of Applied Physics

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Articles you may be interested inInsulator-quantum Hall conductor transition in high electron density gated InGaAs/InAlAs quantum wells J. Appl. Phys. 108, 063701 (2010); 10.1063/1.3486081 Molecular beam epitaxy of high mobility In 0.75 Ga 0.25 As for electron spin transport applications Magnetoresistance in high-density two-dimensional electron gas confined in InAlAs/InGaAs quantum well Appl. Phys. Lett. 94, 152107 (2009); 10.1063/1.3119664Controlling electric field and electron density in a double-gated GaAs/AlGaAs quantum well Improvement of the electron density in the channel of an AlGaAs/GaAs heterojunction by introducing Si δ doping in the quantum well Quantum oscillations of dissipative resistance are observed in response to electric current applied to a GaAs quantum well with variable two dimensional electron density placed in quantizing magnetic fields. At a fixed magnetic field, the period of the current induced oscillations depends linearly on the electron density. The observed behavior is in accord with a recently proposed model that considers the DC bias-induced spatial re-population of Landau levels as the origin of the resistance oscillations. It indicates the important role of the electron screening in the vicinity of the quantum well, which significantly enhances the nonlinear response. V C 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4790374] 053709-2 Dietrich et al.

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Spatial variation of the two-dimensional electron gas density induced by an increasing Hall electric field

Cited by 2 publications

References 27 publications

Intersubband resistance oscillations in crossed electric and magnetic fields

Intersubband resistance oscillations in crossed electric and magnetic fields

Quantum oscillations of nonlinear response in electron systems with variable density

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