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The equilibrium properties and interminiband transitions for Hartree-interacting two-dimensional electron gas in a one-dimensional chain of planar quantum rings subjected to a transverse homogeneous magnetic field are examined theoretically…

介观与纳米尺度物理 · 物理学 2024-10-03 Armen Harutyunyan , Vram Mughnetsyan , Albert Kirakosyan , Vidar Gudmundsson

In high-mobility two-dimensional electron gases Landau levels are already formed at very small magnetic field values. Such two-dimensional electron gases show a huge negative magnetoresistance at low temperatures and an unexpected and very…

介观与纳米尺度物理 · 物理学 2015-09-21 L. Bockhorn , J. Inarrea , R. J. Haug

We report an unusual breakdown of the magnetically induced Wigner solid in an exceptional two-dimensional electron gas. The current-voltage characteristic is found to be hysteretic in the voltage biased setup and has a region of negative…

介观与纳米尺度物理 · 物理学 2007-05-23 G. A. Csathy , D. C. Tsui , L. N. Pfeiffer , K. W. West

A theoretical prediction of the spin-dependent electron self-energy and in-plane transport of a two-dimensional electron gas in proximity with a ferromagnetic gate is presented. The application of the predicted spin-dependent properties is…

介观与纳米尺度物理 · 物理学 2009-11-07 C. Ciuti , J. P. McGuire , L. J. Sham

Transport in a two-dimensional electron gas subject to an external magnetic field is analyzed in the presence of a \textit{longitudinal barrier.} We show that \textit{quantum interference of the edge states} bound by the longitudinal…

介观与纳米尺度物理 · 物理学 2009-11-11 A. M. Kadigrobov , M. V. Fistul , K. B. Efetov

We have measured the magnetization of a dual-subband two-dimensional electron gas, confined in a GaAs/AlGaAs heterojunction. In contrast to two-dimensional electron gases with a single subband, we observe non-1/B-periodic, triangularly…

介观与纳米尺度物理 · 物理学 2007-05-23 M. R. Schaapman , U. Zeitler , P. C. M. Christianen , J. C. Maan , D. Reuter , A. D. Wieck , D. Schuh , M. Bichler

At low temperatures, in very clean two-dimensional (2D) samples the electron mean free path for collisions with static defects and phonons becomes greater than the sample width. Under this condition, the electron transport occurs by…

介观与纳米尺度物理 · 物理学 2016-12-15 P. S. Alekseev

Recent measurements of a 2D electron gas subjected to microwave radiation reveal a magnetoresistance with an oscillatory dependence on the ratio of radiation frequency to cyclotron frequency. We perform a diagrammatic calculation and find…

介观与纳米尺度物理 · 物理学 2009-11-10 Adam C. Durst , Subir Sachdev , N. Read , S. M. Girvin

Magnetoconductance of a gated two-dimensional electron gas (2DEG) in the inversion layer on p-type HgCdTe crystal is investigated. At strong magnetic fields, characteristic features such as quantum Hall effect of a 2DEG with single subband…

介观与纳米尺度物理 · 物理学 2015-05-20 Rui Yang , Guolin Yu , Kuanghong Gao , Laiming Wei , Xinzhi Liu , Tie Lin , Shaoling Guo , Ning Dai , Junhao Chu

Two effects of oscillatory transformations of vortex textures in flat nanomagnets due to the application of an external field or a spin-polarized electric current are analytically described with relevance to soft-magnetic structures of…

介观与纳米尺度物理 · 物理学 2012-06-06 Andrzej Janutka

We have investigated the electrical transport properties of Dirac electrons in a monolayer graphene sheet in the presence of a perpendicular magnetic field that is modulated weakly and periodically along one direction.We find that the…

介观与纳米尺度物理 · 物理学 2009-11-13 M. Tahir , K. Sabeeh

Recent results on magnetoresistance in a two dimensional electron gas under crossed magnetic and microwave fields show a new class of oscillations, suggesting a new kind of zero-resistance states. A complete understanding of the effect is…

介观与纳米尺度物理 · 物理学 2009-11-10 P. H. Rivera , P. A. Schulz

A semiclassical theory based on the Boltzmann transport equation for a two-dimensional electron gas modulated along one direction with weak electrostatic or magnetic modulations is proposed. It is shown that oscillations of the…

介观与纳米尺度物理 · 物理学 2009-11-07 Natalya A. Zimbovskaya

At low densities, electrons confined to two dimensions in a delta-doped heterostructure can arrange themselves into self-consistent droplets due to disorder and screening effects. We use this observation to show that at low temperatures,…

强关联电子 · 物理学 2007-10-10 V. Tripathi , M. P. Kennett

Transport properties of the two-dimensional electron gas (2DEG) are considered in the presence of a perpendicular magnetic field $B$ and of a {\it weak} two-dimensional (2D) periodic potential modulation in the 2DEG plane. The symmetry of…

介观与纳米尺度物理 · 物理学 2009-11-10 X. F. Wang , P. Vasilopoulos , F. M. Peeters

The single electron magnetotransport in a vertical bi-layer semiconductor nanowire made of InAlAs/InGaAs and AlGaAs/GaAs heterostructure is theoretically studied. The magnetic field is directed perpendicularily to the main (transport) axis…

介观与纳米尺度物理 · 物理学 2016-08-24 T. Chwiej

On the basis of Boltzmann's equation, and including anisotropic scattering in the collision operator, we investigate the effect of one-dimensional superlattices on two-dimensional electron systems. In addition to superlattices defined by…

介观与纳米尺度物理 · 物理学 2009-10-30 Rolf Menne , Rolf R. Gerhardts

Angle dependent magnetoresistance experiments on organic conductors exhibit a wide range of angular oscillations associated with the dimensionality and symmetry of the crystal structure and electron energy dispersion. In particular,…

强关联电子 · 物理学 2013-02-04 Pashupati Dhakal , Harukazu Yoshino , Jeong-Il Oh , Koichi Kikuchi , Michael J. Naughton

The magnetoplasmon spectrum of a magnetically modulated two-dimensional electron gas (MM2DEG) is investigated. We derive the inter and intra Landau band magnetoplasmon spectrum within the self consistent field approach. The derivation is…

介观与纳米尺度物理 · 物理学 2009-12-12 M. Tahir , K. Sabeeh , A. MacKinnon

By solving the Boltzmann transport equation we investigate theoretically the general form of oscillations in the resistivity caused by varying the direction of an applied magnetic field for the case of quasi-two dimensional systems on…

介观与纳米尺度物理 · 物理学 2016-06-06 Joseph C. A. Prentice , Amalia I. Coldea