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相关论文: Microscopic calculation of thermally-induced spin-…

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Antiferromagnets are promising candidates as active components in spintronic applications. They share features with ferrimagnets in that opposing spin orientations exist in two or more sublattices. Spin transfer torque and spin pumping are…

介观与纳米尺度物理 · 物理学 2024-09-24 Hans Gløckner Giil , Arne Brataas

Thermal fluctuations of nanomagnets driven by spin-polarized currents are treated via the Landau-Lifshitz-Gilbert equation as generalized to include both the random thermal noise field and Slonczewski spin-transfer torque terms. The…

统计力学 · 物理学 2017-09-26 Y. P. Kalmykov , D. Byrne , W. T. Coffey , W. J. Dowling , S. V. Titov , J. E. Wegrowe

We propose a new quantum-mechanical formalism to calculate spin torques based on the gradient expansion, which naturally involves spacetime gradients of the magnetization and electromagnetic fields. We have no assumption in the…

介观与纳米尺度物理 · 物理学 2017-08-14 Atsuo Shitade

We theoretically investigate spin transport in half-metallic ferromagnets at finite temperatures. The side-jump and skew-scattering contributions to spin Hall conductivity are derived using the Kubo formula. The electron-magnon interaction…

材料科学 · 物理学 2016-11-08 Y. Ohnuma , M. Matsuo , S. Maekawa

We consider a strongly interacting quantum dot connected to two leads held at quite different temperatures. Our aim is to study the behavior of the Kondo effect in the presence of large thermal biases. We use three different approaches,…

介观与纳米尺度物理 · 物理学 2017-09-04 Miguel A. Sierra , David Sanchez , Rosa Lopez

The finite-temperature density-matrix renormalization-group method is applied to the one-dimensional Kondo lattice model near half filling to study its thermodynamics. The spin and charge susceptibilities and entropy are calculated down to…

强关联电子 · 物理学 2009-10-31 N. Shibata , H. Tsunetsugu

We study magnetic field-induced three-dimensional ordering transitions in low-dimensional quantum spin liquids, such as weakly coupled, antiferromagnetic spin-1/2 Heisenberg dimers and ladders. Using stochastic series expansion quantum…

强关联电子 · 物理学 2009-11-07 Stefan Wessel , Maxim Olshanii , Stephan Haas

Motivated by the recently observed failure of the kinetic theory for the bulk viscosity, we in turn revisit the shear viscosity and the thermal conductivity of two-component fermions with a zero-range interaction both in two and three…

量子气体 · 物理学 2024-12-04 Keisuke Fujii , Yusuke Nishida

We present a calculation of the spin alignment for unflavored vector mesons in thermalized quark-gluon plasma based on the Kubo formula in linear response theory. This is achieved by expanding the system to the first order of the coupling…

高能物理 - 唯象学 · 物理学 2024-03-06 Wen-Bo Dong , Yi-Liang Yin , Xin-Li Sheng , Shi-Zheng Yang , Qun Wang

The thermodynamics of the quantum Heisenberg antiferromagnet on a square lattice is revisited through a linearized spin-wave theory which is well defined at any finite temperature. We re-examine in details the temperature dependence of the…

强关联电子 · 物理学 2009-12-31 M. M. Liang , Y. H. Su

We investigate theoretically the Seebeck effect in materials close to a ferromagnetic quantum critical point to explain anomalous behaviour at low temperatures. It is found that the main effect of spin fluctuations is to enhance the…

强关联电子 · 物理学 2015-05-13 Takuya Okabe

Thermodynamic properties of the one-dimensional Kondo lattice model at half-filling are studied by the density matrix renormalization group method applied to the quantum transfer matrix. Spin susceptibility, charge susceptibility, and…

强关联电子 · 物理学 2007-05-23 N. Shibata , B. Ammon , M. Troyer , M. Sigrist , K. Ueda

The temperature-dependent uniform magnetic susceptibility of interacting electrons in one dimension is calculated using several methods. At low temperature, the renormalization group reaveals that the Luttinger liquid spin susceptibility…

强关联电子 · 物理学 2009-10-31 H. Nélisse , C. Bourbonnais , H. Touchette , Y. M. Vilk , A. -M. S. Tremblay

In this paper we employ non equilibrium thermodynamics of fluxes and forces to describe magnetization and heat transport. By the theory we are able to identify the thermodynamic driving force of the magnetization current as the gradient of…

Using the complex stereographic variable representation for the macrospin, from a study of the nonlinear dynamics underlying the generalized Landau-Lifshitz(LL) equation with Gilbert damping, we show that the spin-transfer torque is…

其他凝聚态物理 · 物理学 2013-12-30 S. Murugesh , M. Lakshmanan

We use atomistic stochastic Landau-Lifshitz-Slonczewski simulations to study the interaction between large thermal fluctuations and spin transfer torques in the magnetic layers of spin valves. At temperatures near the Curie temperature…

介观与纳米尺度物理 · 物理学 2015-05-13 Paul M. Haney , M. D. Stiles

Based on the solution of the stochastic Landau-Lifshitz-Gilbert equation discretized for a ferromagnetic chain subject to a uniform temperature gradient, we present a detailed numerical study of the spin dynamics with a focus particularly…

材料科学 · 物理学 2014-07-15 S. R. Etesami , L. Chotorlishvili , A. Sukhov , J. Berakdar

We study spin-dependent heat transport in quantum gases, focusing on transport phenomena related to pure spin currents and spin-dependent temperatures. Using the Boltzmann equation, we compute the coupled spin and heat transport…

量子气体 · 物理学 2015-04-08 Clement H. Wong , H. T. C. Stoof , R. A. Duine

The migration of planets on nearly circular, non-inclined orbits in protoplanetary discs is entirely described by the disc's torque. This torque is a complex function of the disc parameters, and essentially amounts to the sum of two…

地球与行星天体物理 · 物理学 2017-09-06 María Alejandra Jiménez , Frédéric S. Masset

We report a finite temperature micromagnetic method (FTM) that allows for the calculation of the coercive field of arbitrary shaped magnetic nanostructures at time scales of nanoseconds to years. Instead of directly solving the…

材料科学 · 物理学 2015-06-03 D. Suess , L. Breth , J. Lee , M. Fuger , C. Vogler , F. Bruckner , B. Bergmair , T. Huber , J. Fidler , T. Schrefl