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We have studied the interaction between magnetism and superconductivity in a pseudo-spin-valve structure consisting of a Co/Cu/Py/Nb layer sequence. We are able to control the magnetization reversal process and monitor it by means of the…

超导电性 · 物理学 2012-02-06 A. K. Suszka , F. S. Bergeret , A. Berger

We present a theoretical study on the spin-dependent transport through a spin valve consisting of graphene sandwiched between two magnetic leads with an arbitrary orientation of the lead magnetization. No gate voltage is applied. Using…

介观与纳米尺度物理 · 物理学 2009-11-13 Kai-He Ding , Zhen-Gang Zhu , Jamal Berakdar

Monolayer graphene with an energy gap presents a pseudospin symmetry broken ferromagnet with a perpendicular pseudomagnetization whose direction is switched by altering the type of doping between n and p. We demonstrate an electrical…

介观与纳米尺度物理 · 物理学 2015-05-30 Leyla Majidi , Malek Zareyan

Magnetostatic surface spin waves (MSSW) excited from a coplanar waveguide antenna travel in different directions with different amplitudes. This effect, called nonreciprocity of MSSW, has been investigated by micromagnetic simulations. The…

材料科学 · 物理学 2015-06-17 Praveen Deorani , Jae Hyun Kwon , Hyunsoo Yang

We investigate ballistic spin transport in a two dimensional electron gas system through magnetic barriers of various geometries using the transfer matrix method. While most of the previous studies have focused on the effect of magnetic…

介观与纳米尺度物理 · 物理学 2015-06-18 Nammee Kim , Heesang Kim

Spin valves form a key building block in a wide range of spintronic concepts and devices from magnetoresistive read heads to spin-transfer-torque oscillators. We elucidate the dependence of the magnetic damping in the free layer on the…

介观与纳米尺度物理 · 物理学 2019-04-11 Akashdeep Kamra , Dmytro M. Polishchuk , Vladislav Korenivski , Arne Brataas

Using a multi-conduction-channel model, we redefined the micromechanism of spin Hall magnetoresistance (SMR). Four conduction channels are created by spin accumulation of nonpolarized electron flow at top, bottom, left and right interfaces…

材料科学 · 物理学 2015-02-17 Yan-Qing Zhang , Hua-Rui Fu , Niu-Yi Sun , Wen-Ru Che , Ding Ding , Juan Qin , Cai-Yin You , Zhen-Gang Zhu , Rong Shan

Anisotropic magnetoresistance (AMR), originating from spin-orbit coupling (SOC), is the sensitivity of the electrical resistance in magnetic systems to the direction of spin magnetization. Although this phenomenon has been experimentally…

材料科学 · 物理学 2020-08-12 Dongzhe Li , Fabian Pauly , Alexander Smogunov

We generalize the construction of time-reversal symmetry-breaking triple-component semimetals, transforming under the pseudospin-1 representation, to arbitrary (anti-)monopole charge $2 n$, with $n=1,2,3$ in the crystalline environment. The…

介观与纳米尺度物理 · 物理学 2019-12-09 Snehasish Nandy , Sourav Manna , Dumitru Calugaru , Bitan Roy

We study the effects of spin-flip scatterings on the time-dependent transport properties through a magnetic quantum dot attached to normal and ferromagnetic leads. The transient spin-dynamics as well as the steady-state tunneling…

介观与纳米尺度物理 · 物理学 2009-11-13 Enrico Perfetto , Gianluca Stefanucci , Michele Cini

We present microscopic results on the giant tunneling magnetoresistance that arises from the nanoscale coexistence of ferromagnetic metallic (FMM) and antiferromagnetic insulating (AFI) clusters in a disordered two dimensional electron…

无序系统与神经网络 · 物理学 2009-11-11 Sanjeev Kumar , Chandra Shekhar Mohapatra , Pinaki Majumdar

The discovery that a spin polarized current can exert a large torque on a ferromagnet through a transfusion of spin angular momentum, offers a new way to control a magnetization by simple current injection, without the help of an applied…

We consider quasi-two-dimensional gas of electrons in a typical Si-MOSFET, assuming repulsive contact interaction between electrons. Magnetisation and susceptibility are evaluated within the mean-field approach. Finite thickness of the…

介观与纳米尺度物理 · 物理学 2017-06-28 D. I. Golosov

Spin-dependent transport in a full van der Waals (vdW) giant magnetoresistance (GMR) junctions with the structure of Fe3GeTe2/XTe2/Fe3GeTe2 (X = Pt, Pd) has been investigated by using first-principles calculations. The ballistic…

材料科学 · 物理学 2021-10-07 Xinlu Li , Yurong Su , Meng Zhu , Fanxing Zheng , Peina Zhang , Jia Zhang , Jing-Tao Lü

We study mesoscopic spin Hall effect on the surface of topological insulator with a step-function potential. The giant spin polarization induced by a transverse electric current is derived analytically by using McMillan method in the…

介观与纳米尺度物理 · 物理学 2011-05-05 Jin-Hua Gao , Jie Yuan , Wei-Qiang Chen , Yi Zhou , Fu-Chun Zhang

We formulate a theory of current-induced spin torques in inhomogeneous III-V ferromagnetic semiconductors. The carrier spin-3/2 and large spin-orbit interaction, leading to spin non-conservation, introduce significant conceptual differences…

其他凝聚态物理 · 物理学 2015-05-13 Dimitrie Culcer , M. E. Lucassen , R. A. Duine , R. Winkler

A "spin-flip transistor" is a lateral spin valve consisting of ferromagnetic source drain contacts to a thin-film normal-metal island with an electrically floating ferromagnetic base contact on top. We analyze the \emph{dc}-current-driven…

介观与纳米尺度物理 · 物理学 2009-11-11 Xuhui Wang , Gerrit E. W. Bauer , Axel Hoffmann

Carrier transport in materials is often diffusive due to momentum-relaxing scattering with phonons and defects. Suppression of momentum-relaxing scattering can lead to the ballistic and hydrodynamic transport regimes, wherein complex…

The temperature dependence of the giant magnetoresistance (GMR) for currents parallel and perpendicular to the multilayer plane, is discussed by taking account of the random exchange potentials, phonon scatterings and spin fluctuations. The…

凝聚态物理 · 物理学 2009-10-28 Hideo Hasegawa

Non-uniform current distributions of spin valves with disk shaped free layers are investigated. In the context of spin valves, the vortex state, which is the ground-state in many disk shaped magnetic bodies, allows for distinct parallel…