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We consider theoretically a wide graphene ribbon, that on both ends is attached to electronic reservoirs which generally have different temperatures. The graphene ribbon is assumed to be deposited on a substrate, that leads to a spin-orbit…

介观与纳米尺度物理 · 物理学 2015-09-02 M. Inglot , V. K. Dugaev , J. Barnaś

We consider the non-analytic terms in the spin susceptibility arising as a result of rescaterring of pairs of quasiparticles. We emphasize the importance of rescattering in the Cooper channel for the analysis of the temperature dependences…

强关联电子 · 物理学 2007-05-23 A. Shekhter , A. M. Finkel'stein

This Letter presents ab initio calculations of the magneto-thermoelectric power (MTEP) and of the spin-Seebeck coefficient in MgO based tunnel junctions with Fe and Co leads. In addition, the normal thermopower is calculated and gives for…

介观与纳米尺度物理 · 物理学 2011-04-26 Michael Czerner , Michael Bachmann , Christian Heiliger

We show that spin-polarized dc current passing through a small magnetic element induces two-state, random telegraph switching of the magnetization via the spin-momentum transfer effect. The resistances of the states differ by up to 50% of…

Spin pumping is the emission of a spin current by a magnetization dynamics while spin transfer stands for the excitation of magnetization by spin currents. Using Onsager's reciprocity relations we prove that spin pumping and spin-transfer…

介观与纳米尺度物理 · 物理学 2012-03-07 Arne Brataas , Yaroslav Tserkovnyak , Gerrit E. W. Bauer , Paul J. Kelly

We study the temperature dependence of the conductivity of the 2D electronic solid. In realistic samples, a domain structure forms in the solid and each domain randomly orients in the absence of the in-plane field. At higher temperature,…

介观与纳米尺度物理 · 物理学 2009-11-10 Shi-Jie Yang , Yue Yu

In this work, we study the stochastic dynamics of micro-magnetics interacting with a spin-current torque. We extend the previously constructed stochastic Landau-Lifshitz equation to the case with spin-current torque, and verify the…

统计力学 · 物理学 2024-08-06 Mingnan Ding , Jun Wu , Xiangjun Xing

The probability switching characteristics in spin transfer torque magnetic tunnel junctions (STT-MTJs) are simulated by considering thermal noise using a spin-circuit module. Thermal noise significantly affects the probability switching for…

应用物理 · 物理学 2025-05-02 Shaojie Hu , Fupeng Gao , Tengwei Huang , Zhizhong Wang , Hui Li , Dawei Wang

We describe time-domain measurements which provide new information about the large-angle nonlinear dynamics of nanomagnets excited by spin-transfer torque from a spin-polarized current. Sampling-oscilloscope measurements, which average over…

材料科学 · 物理学 2009-11-13 I. N. Krivorotov , N. C. Emley , R. A. Buhrman , D. C. Ralph

Recent experimental and theoretical studies show that the switching behavior of magnetic nanoparticles can be well controlled by external time-dependent magnetic fields. In this work, we inspect theoretically the influence of the…

其他凝聚态物理 · 物理学 2013-09-18 Alexander Sukhov , Jamal Berakdar

We investigate the spin-dependent thermoelectric effects in magnetic graphene in both diffusive and ballistic regimes. Employing the Boltzmann and Landauer formalisms we calculate the spin and charge Seebeck coefficients (thermopower) in…

介观与纳米尺度物理 · 物理学 2015-04-10 Babak Zare Rameshti , Ali G. Moghaddam

The effect of a random transverse field (RTF) on the wetting and layering transitions of a spin-1/2 Ising model, in the presence of bulk and surface fields, is studied within an effective field theory by using the differential operator…

软凝聚态物质 · 物理学 2007-05-23 L. Bahmad , A. Benyoussef , A. El-Kenz , H. Ez-Zahraouy

The influence of temperature and transport conditions on the electron spin relaxation in lightly doped n-type GaAs semiconductors is investigated. A Monte Carlo approach is used to simulate electron transport, including the evolution of…

统计力学 · 物理学 2011-12-20 Stefano Spezia , Dominique Persano Adorno , Nicola Pizzolato , Bernardo Spagnolo

If the second law of thermodynamics forbids a transition from one state to another, then it is still possible to make the transition happen by using a sufficient amount of work. But if we do not have access to this amount of work, can the…

量子物理 · 物理学 2016-11-02 Álvaro M. Alhambra , Jonathan Oppenheim , Christopher Perry

We present a comprehensive study of the temperature (T) dependence of the longitudinal spin Seebeck effect (LSSE) in Pt/EuO_{1-x} and Pt/La2NiMnO6 (LNMO) hybrid structures across their Curie temperatures (Tc). Both systems host…

介观与纳米尺度物理 · 物理学 2020-01-08 Kingshuk Mallick , Aditya A. Wagh , Adrian Ionescu , Crispin H. W. Barnes , P. S. Anil Kumar

One of the most important challenges in antiferromagnetic spintronics is the read-out of the N\'eel vector state. High current densities up to 10$^8$ Acm$^{-2}$ used in the electrical switching experiments cause notorious difficulty in…

In the conventional paradigm of the spin Hall effect, the side-jump conductivity due to electron-phonon scattering is regarded to be temperature independent. To the contrary, we draw the distinction that, while this side-jump conductivity…

介观与纳米尺度物理 · 物理学 2019-08-21 Cong Xiao , Yi Liu , Zhe Yuan , Shengyuan A. Yang , Qian Niu

We have theoretically investigated transport properties of the classical Heisenberg antiferromagnet on the triangular lattice in which a binding-unbinding topological transition of $\mathbb{Z}_2$ vortices is predicted to occur at a finite…

强关联电子 · 物理学 2020-01-31 K. Aoyama , H. Kawamura

Current-induced spin polarization in a two-dimensional electron gas with Rashba spin-orbit interaction is considered theoretically in terms of the Matsubara Green functions. This formalism allows to describe temperature dependence of the…

介观与纳米尺度物理 · 物理学 2017-06-14 A. Dyrdal , J. Barnas , V. K. Dugaev

We calculate the transport relaxation time $\tau _{\rm tr}$ and spin transport relaxation time $\tau _{s,{\rm tr}}$ for a two-dimensional electron gas with spatially fluctuating Rashba spin-orbit interaction. These relaxation times…

介观与纳米尺度物理 · 物理学 2018-06-27 S. Kudla , A. Dyrdal , V. K. Dugaev , E. Ya. Sherman , J. Barnas