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In thin film ferromagnets with perfect easy-plane anisotropy, the component of total spin perpendicular to the easy plane is a good quantum number and the corresponding spin supercurrent can flow without dissipation. In this Letter we…

介观与纳米尺度物理 · 物理学 2014-12-10 Hua Chen , Andrew D. Kent , Allan H. MacDonald , Inti Sodemann

Strongly nonlinear transport through Diluted Magnetic Semiconductor multiquantum wells occurs due to the interplay between confinement, Coulomb and exchange interaction. Nonlinear effects include the appearance of spin polarized stationary…

介观与纳米尺度物理 · 物理学 2009-10-14 R. Escobedo , M. Carretero , L. L. Bonilla , G. Platero

We examined dipolar field effects on the microwave generation in the domain wall spin-valve by solving simultaneously the Landau-Lifshitz-Gilbert and Zhang-Levy-Fert diffusion equations. By numerically analyzing dipolar field dependence, we…

介观与纳米尺度物理 · 物理学 2009-10-14 Katsuyoshi Matsushita , Jun Sato , Hiroshi Imamura

We present an experimental investigation of radial spin-wave modes in magnetic nano-disks with a vortex ground state. The spin-wave amplitude was measured using a frequency-resolved magneto optical network analyzer, allowing for…

介观与纳米尺度物理 · 物理学 2015-06-23 M. Helsen , A. Gangwar , J. De Clercq , A. Vansteenkiste , B. Van Waeyenberge

We study analytically the time-dependent boundary conditions of superconducting microwave circuit experiments in the high plasma frequency limit, in which the conditions are Robin-type and relate the value of the field to the spatial…

量子物理 · 物理学 2015-02-19 Jason Doukas , Jorma Louko

We report on microwave (mw) radiation induced electric currents in (Cd,Mn)Te/(Cd,Mg)Te and InAs/(In,Ga)As quantum wells subjected to an external in-plane magnetic field. The current generation is attributed to the spin-dependent energy…

The transfer of spin angular momentum to a nanomagnet from a spin polarized current provides an efficient means of controlling the magnetization direction in nanomagnets. A unique consequence of this spin torque is that the spontaneous…

介观与纳米尺度物理 · 物理学 2018-07-31 Dinesh Kumar , K. Konishi , Nikhil Kumar , S. Miwa , A. Fukushima , K. Yakushiji , S. Yuasa , H. Kubota , C. V. Tomy , A. Prabhakar , Y. Suzuki , A. Tulapurkar

Spin waves are of large interest as data carriers for future logic devices. However, due to the strong anisotropic dispersion relation of dipolar spin-waves in in-plane magnetised films the realisation of two-dimensional information…

其他凝聚态物理 · 物理学 2018-09-14 Marc Vogel , Rick Aßmann , Philipp Pirro , Andrii V. Chumak , Burkard Hillebrands , Georg von Freymann

Effects of a microwave voltage on magnetization precession are analyzed based on a macrospin model. The microwave voltage induces the oscillating anisotropy field through the voltage controlled magnetic anisotropy (VCMA) effect, and then…

介观与纳米尺度物理 · 物理学 2021-01-04 Hiroshi Imamura , Rie Matsumoto

To study the influence of microwave irradiation on two-dimensional electrons, we apply a method based on capacitance measurements in GaAs quantum well samples where the gate covers a central part of the layer. We find that the capacitance…

介观与纳米尺度物理 · 物理学 2016-08-17 A. D. Levin , G. M. Gusev , O. E. Raichev , Z. S. Momtaz , A. K. Bakarov

Magnetic fields break time-reversal symmetry, which is leveraged in many settings to enable the nonreciprocal behavior of light. This is the core physics of circulators and other elements used in a variety of microwave and optical settings.…

量子物理 · 物理学 2021-07-19 Brittany Richman , Jacob M. Taylor

The spin-orbit coupling systems with a zero magnetic field is studied under the equilibrium situation, {\it i.e.}, without a voltage bias. A persistent spin current is predicted to exist under most circumstances, although the persistent…

介观与纳米尺度物理 · 物理学 2015-06-25 Qing-feng Sun , X. C. Xie

To realize spin wave logic gates programmable phase inverters are essential. We image with phase-resolved Brillouin light scattering microscopy propagating spin waves in a one-dimensional magnonic crystal consisting of dipolarly coupled…

介观与纳米尺度物理 · 物理学 2021-04-23 Korbinian Baumgaertl , Dirk Grundler

The nonlinearity of magnetization precession and spin waves is a cornerstone of contemporary magnonics. We investigate nonlinear magnetization dynamics in a thin epitaxial iron film driven by femtosecond laser pulses in regimes of…

We predict a novel nonlinear electromagnetic phenomenon in layered superconducting slabs irradiated from one side by an electromagnetic plane wave. We show that the reflectance and transmittance of the slab can vary over a wide range, from…

超导电性 · 物理学 2015-05-19 S. S. Apostolov , Z. A. Maizelis , M. A. Sorokina , V. A. Yampol'skii , Franco Nori

The Doppler shift of the quasiparticle dispersion by charge currents is responsible for the critical supercurrents in superconductors and instabilities of the magnetic ground state of metallic ferromagnets. Here we predict an analogous…

介观与纳米尺度物理 · 物理学 2021-04-07 Tao Yu , Chen Wang , Michael A. Sentef , Gerrit E. W. Bauer

We experimentally study nonlinear propagation of spin waves in microscopic yttrium iron garnet waveguides, where the dispersion spectrum is engineered to enable efficient four-magnon interactions over a wide range of wavelengths. We show…

介观与纳米尺度物理 · 物理学 2024-07-12 K. O. Nikolaev , B. Das Mohapatra , G. Schmidt , S. O. Demokritov , V. E. Demidov

Propagation of easy-plane magnetic precession can enable more efficient spin transport than conventional spin waves. Such easy-plane spin transport is typically understood in terms of a hydrodynamic model, partially analogous to…

We analyze theoretically the spin dynamics of exciton-polaritons and photons during their Bloch oscillations in a one-dimensional microwire. The wire geometry induces an energy splitting between the longitudinal and transverse electric…

介观与纳米尺度物理 · 物理学 2012-01-30 Hugo Flayac , Dmitry Solnyshkov , Guillaume Malpuech

The field of magnonics, which utilizes propagating spin waves for nano-scale transmission and processing of information, has been significantly advanced by the advent of the spin-orbit torque. The latter phenomenon can allow one to overcome…

介观与纳米尺度物理 · 物理学 2020-05-05 V. E. Demidov , S. Urazhdin , A. Anane , V. Cros , S. O. Demokritov