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We report angular-dependent spin-wave spectroscopy on kagome artificial spin ice made of large arrays of interconnected Ni80Fe20 nanobars. Spectra taken in saturated and disordered states exhibit a series of resonances with characteristic…

介观与纳米尺度物理 · 物理学 2017-07-26 V. S. Bhat , F. Heimbach , I. Stasinopoulos , D. Grundler

We have synthesized nanoscale magnetic compasses with high yield. These ferromagnetic iron carbide nano-particles, which are encapsulated in a pair of parallel carbon needles, change their direction in response to an external magnetic…

介观与纳米尺度物理 · 物理学 2017-10-11 Hidetsugu Shiozawa , Desai Zhang , Michael Eisterer , Paola Ayala , Thomas Pichler , Martha R. McCartney , David J. Smith

We have measured the magneto-resistance of a two-dimensional electron gas (2DEG) under continuous microwave irradiation as a function of electron density and mobility tuned with a metallic top-gate. In the entire range of density and…

强关联电子 · 物理学 2009-11-11 B. Simovic , C. Ellenberger , K. Ensslin , Wegscheider

When a nanoribbon is bent under a homogeneous external magnetic field, the effective magnetic field inside becomes either homogeneous or inhomogeneous, depending on the direction of the field. This enables the selective creation of bulk,…

介观与纳米尺度物理 · 物理学 2025-08-22 Ponder Liu , Hao-Cheng Hung , You-Ting Huang , Jia-Cheng Li , Carmine Ortix , Ching-Hao Chang

We study the effect of a magnetic field on the behaviour of a slender conducting elastic structure, motivated by stability problems of electrodynamic space tethers. Both statical (buckling) and dynamical (whirling) instability are…

动力系统 · 数学 2008-10-22 J. Valverde , G. H. M. van der Heijden

The anisotropic diffusion of electrons with various rigidity and the anomalous conductivity of a collisionless plasma in the presence of Weibel-generated quasi-static turbulent and uniform external magnetic fields are examined. Using an…

The influence of microwave radiation (1.2-140 GHz) on resistance of high-mobility two-dimensional electron gas in GaAs quantum wells is studied. Two series of microwave-induced magnetoresistance oscillations periodic in 1/B were observed…

介观与纳米尺度物理 · 物理学 2007-05-23 A. A. Bykov , A. V. Goran , D. R. Islamov , A. K. Bakarov , Jing-qiao Zhang , Sergey Vitkalov

Nonlinear magnetotransport of a microwave-irradiated high mobility two-dimensional electron system under a finite direct current excitation is analyzed using a dc-controlled scheme with photon-assisted transition mechanism. The predicted…

介观与纳米尺度物理 · 物理学 2008-08-27 X. L. Lei , S. Y. Liu

We report on a theoretical study of the commensurability oscillations in a quasi-two-dimensional electron gas modulated by a unidirectional periodic potential and subjected to tilted magnetic fields with a strong in-plane component. As a…

介观与纳米尺度物理 · 物理学 2015-12-09 Ludvik Smrcka

Effects of electron-electron and spin-orbit interactions on the ground-state magnetic configuration and on the corresponding thermoelectric and spin thermoelectric properties in zigzag nanoribbons of two-dimensional hexagonal crystals are…

介观与纳米尺度物理 · 物理学 2015-12-09 Michal Wierzbicki , Jozef Barnas , Renata Swirkowicz

We develop a theory of magnetoresistance of two-dimensional electron systems in a smooth disorder potential in the hydrodynamic regime. Our theory applies to two-dimensional semiconductor structures with strongly correlated carriers when…

介观与纳米尺度物理 · 物理学 2017-03-22 Alex Levchenko , Hong-Yi Xie , A. V. Andreev

We present a detailed theoretical investigation on the radiation induced giant magnetoresistance oscillations recently discovered in high-mobility two-dimensional electron gas. Electron interactions with impurities, transverse and…

介观与纳米尺度物理 · 物理学 2007-05-23 X. L. Lei

We consider a two dimensional semiconductor with carriers subject to spin-orbit interactions and scattered by randomly distributed magnetic impurities. We solve the time-dependent Schroedinger equation to investigate the relationship…

介观与纳米尺度物理 · 物理学 2017-08-23 T. L. van den Berg , A. Verga

We have considered the conductivity properties of a two dimensional electron gas (2DEG) in two different kinds of inhomogeneous magnetic fields, i.e.\ a disordered distribution of magnetic flux vortices, and a periodic array of magnetic…

凝聚态物理 · 物理学 2016-08-14 Mads Nielsen , Per Hedegård

The magnetic configurations of cylindrical Co-rich CoNi nanowires have been quantitatively analyzed at the nanoscale by electron holography and correlated to local structural and chemical properties. The nanowires display grains of both…

The electrostatic theory of magnetoplasmons on a semi-infinite magnetized electron gas is generalized to mixed Faraday-Voigt configurations. We analyze a new type of electrostatic surface waves that is strongly direction-dependent, and may…

光学 · 物理学 2021-05-20 Afshin Moradi , Martijn Wubs

A two dimensional magnetic particle in the presence of an external magnetic field is studied. Equilibrium thermodynamical properties are derived by evaluating analytically the partition function. When the external field is applied…

凝聚态物理 · 物理学 2009-11-07 P. Vargas , D. Altbir , M. Knobel , D. Laroze

Theoretical calculations predict the dissipationless circulating current induced by a spin defect in a two-dimensional electron gas with spin-orbit coupling. The shape and spatial extent of these dissipationless circulating currents depend…

介观与纳米尺度物理 · 物理学 2021-11-15 Adonai R. da Cruz , Michael E. Flatté

The unsymmetric confinement of the electrons in a typical 2-dimensional electron gas (2DEG) breaks the full cubic symmetry of the in-plane transport properties. A rigorous invariance of the transport under rotation by pi/2 about the cubic…

介观与纳米尺度物理 · 物理学 2007-05-23 Herbert Kroemer

We have investigated distinctive transport phenomena in two-dimensional electron gas (2DEG) narrow channel subjected to a large magnetic field gradient, a unique situation created in a ferromagnet/2DEG hybrid structure. The so-called snake…

介观与纳米尺度物理 · 物理学 2009-11-10 M. Hara , A. Endo , S. Katsumoto , Y. Iye