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We have studied the magnetoresistance of the quantum point contact fabricated on the high mobility two-dimensional electron gas (2DEG) exposed to microwave irradiation. The resistance reveals giant $B$-periodic oscillations with the…

Mesoscale and Nanoscale Physics · Physics 2017-07-19 A. D. Levin , S. A. Mikhailov , G. M. Gusev , Z. D. Kvon , E. E. Rodyakina , A. V. Latyshev

We study the microwave-induced photoconductivity of a two-dimensional electron system (2DES) in the presence of a magnetic field and a two-dimensional modulation. The microwave and Landau contributions are exactly taken into account, while…

Mesoscale and Nanoscale Physics · Physics 2015-06-25 Manuel Torres , Alejandro Kunold

We have discovered a new phenomenon that inductance oscillates as a function of the angle between an in-plane magnetic field and an electric current direction in permalloy films, which we have named "the anisotropic magneto-inductance (AML)…

Mesoscale and Nanoscale Physics · Physics 2023-06-06 Yuto Shoka , Genki Okano , Hiroyuki Suto , Satoshi Sumi , Hiroyuki Awano , Kenji Tanabe

A magnetic particle with atomic spins ordered in an unstable direction is an example of a false vacuum that decays via excitation of internal spin waves. Coupled evolution of the particle's magnetization (or the vacuum state) and spin…

Statistical Mechanics · Physics 2008-05-05 D. A. Garanin , H. Kachkachi , L. Reynaud

Bilinear magnetoresistance is a nonlinear transport phenomenon that scales linearly with the electric and magnetic fields, and appears in nonmagnetic systems with strong spin-orbit coupling, such as topological insulators (TIs). Using the…

Mesoscale and Nanoscale Physics · Physics 2022-03-23 A. N. Zarezad , A. Dyrdał

Two-dimensional (2D) electrons in an in-plane magnetic field become fully spin polarized above a field B_P, which we can determine from the in-plane magnetoresistance. We perform such measurements in modulation-doped AlAs electron systems,…

Mesoscale and Nanoscale Physics · Physics 2009-11-07 E. P. De Poortere , E. Tutuc , Y. P. Shkolnikov , K. Vakili , M. Shayegan

This short note considers the effects of quantum theory on the linear evolution of the magnetic fields during and after inflation. The analysis appears to show that the magnetic fields decay exponentially in the high-temperature radiation…

High Energy Physics - Theory · Physics 2014-08-07 Ian G. Moss

In this paper we study the effect of a magnetic field on the fluctuation spectrum of the cosmic microwave background. We find that upcoming measurements might give interesting bounds on large scale magnetic fields in the early Universe. If…

Astrophysics · Physics 2009-10-28 Jenni Adams , Ulf H. Danielsson , Dario Grasso , Héctor Rubinstein

It is developed a many-electron approach to explain the recently observed conductivity magnetooscillations in very high mobility 2D electron systems under microwave irradiation. For the first time a theory takes into account the…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 E. E. Takhtamirov , V. A. Volkov

Recently reported giant anisotropy in the longitudinal resistivity of a 2D electron system with valence Landau level index $N \ge 2$ has been interpreted as a signal of unidirectional charge density wave (UCDW) ground states. We report on…

Mesoscale and Nanoscale Physics · Physics 2009-10-31 T. Jungwirth , A. H. MacDonald , L. Smrcka , S. M. Girvin

Using the calculated electron energy band structure of Tl2Ba2CuO6, we compute the dependence of the c axis magnetoresistance on the orientation of the magnetic field for different magnitudes of the magnetic field. We explain the known…

Superconductivity · Physics 2007-05-23 Adrian Dragulescu , Victor M. Yakovenko , David J. Singh

We provide a possible theoretical explanation for the recently observed giant positive magnetoresistance in high mobility low density {\it quasi}-two dimensional electron and hole systems. Our explanation is based on the strong coupling of…

Strongly Correlated Electrons · Physics 2009-10-31 S. Das Sarma , E. H. Hwang

Theoretical conditions to excite self-oscillation in a spin torque oscillator consisting of a perpendicularly magnetized free layer and an in-plane magnetized pinned layer are investigated by analytically solving the Landau-Lifshitz-Gilbert…

Mesoscale and Nanoscale Physics · Physics 2015-08-05 Tomohiro Taniguchi , Takahiro Ito , Yasuhiro Utsumi , Sumito Tsunegi , Hitoshi Kubota

The non-local dielectric response theory is extended to describe oblique reflection of light from quantum wells subjected to the magnetic field. This allows us to calculate the dispersion and polarization of the exciton-polariton modes in…

Mesoscale and Nanoscale Physics · Physics 2009-11-13 D. D. Solnyshkov , M. M. Glazov , I. A. Shelykh , A. V. Kavokin , E. L. Ivchenko , G. Malpuech

Bearing in mind the application to the outer crust of the neutron stars (NSs), we investigate the magnetic field decay by means of the fully relativistic Particle-In-Cell simulations. Numerical computations are carried out in 2-dimensions,…

High Energy Astrophysical Phenomena · Physics 2015-05-20 Hiroyuki R. Takahashi , Kei Kotake , Nobutoshi Yasutake

Using very-high mobility GaAs/AlGaAs 2D electron Hall bar samples, we have experimentally studied the photoresistance/photovoltaic oscillations induced by microwave irradiation in the regime where both 1/B and B-periodic oscillations can be…

Mesoscale and Nanoscale Physics · Physics 2009-11-13 K. Stone , C. L. Yang , Z. Q. Yuan , R. R. Du , L. N. Pfeiffer , K. W. West

We use the perturbative method to study the influence of the magnetic field on the weak deflection angle of charged signals in magnetized stationary and axisymmetric spacetimes within general electromagnetic potentials. The deflection angle…

General Relativity and Quantum Cosmology · Physics 2025-01-08 Qianchuan Wang , Junji Jia

The frequency dependence of the interlayer conductivity of a layered Fermi liquid in a magnetic field which is tilted away from the normal to the layers is considered. For both quasi-one- and quasi-two-dimensional systems resonances occur…

Strongly Correlated Electrons · Physics 2009-10-31 Ross H. McKenzie , Perez Moses

We investigate an electromagnetic instability in two-dimensional materials arising from an anisotropy of the Fermi surface, utilizing a kinetic model accounting for the effects of the values of temperature, chemical potential and anisotropy…

Materials Science · Physics 2025-06-27 Diogo Simões , Hugo Terças , Jorge Ferreira

Shubnikov de Haas resistance oscillations of highly mobile two dimensional helical electrons propagating on a conducting surface of strained HgTe 3D topological insulator are studied in magnetic fields B tilted by angle $\theta$ from the…

Mesoscale and Nanoscale Physics · Physics 2021-05-27 S. Abedi , S. A. Vitkalov , N. N. Mikhailov , Z. D. Kvon
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