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We propose a two-terminal spin-orbit interferometer with a hot molecule inserted in one of its arms to generate pure spin currents. Local heating is achieved by coupling the vibrational modes of the molecule to a third (phononic) reservoir.…

Mesoscale and Nanoscale Physics · Physics 2013-10-22 Sun-Yong Hwang , Jong Soo Lim , Rosa Lopez , Minchul Lee , David Sanchez

Activating metamagnetic transitions between ordered states in van der Waals magnets and devices bring great opportunities in spintronics. We show that external pressure, which enhances the interlayer hopping without introducing chemical…

Strongly Correlated Electrons · Physics 2022-07-25 Tiema Qian , Eve Emmanouilidou , Chaowei Hu , Jazmine C. Green , Igor I. Mazin , Ni Ni

We study the rectification of near-field radiative heat transfer between two InSb nano-particles due to the presence of non-reciprocal surface modes in a nearby InSb sample when an external magnetic field is applied and its dependence on…

Mesoscale and Nanoscale Physics · Physics 2020-04-29 Annika Ott , Svend-Age Biehs

Non-resonant ferromagnetic x-ray diffraction has been used to separate the spin and orbital contribution to the magnetization density of the proposed zero-moment ferromagnet $Sm_{0.982}Gd_{0.018} Al_{2}$. The alignment of the spin and…

Condensed Matter · Physics 2009-11-07 J. W. Taylor , J. A. Duffy , A. M. Bebb , M. R. Lees , L. Bouchenoire , S. D. Brown , M. J. Cooper

The introduction and control of ferromagnetism in graphene opens up a range of new directions for fundamental and applied studies. Several approaches have been pursued so far, such as introduction of defects, functionalization with adatoms,…

Mesoscale and Nanoscale Physics · Physics 2016-11-04 J. C. Leutenantsmeyer , A. A. Kaverzin , M. Wojtaszek , B. J. van Wees

We study the role of thermal fluctuations on the spin dynamics of a thin permalloy film with a focus on the behavior of spin torque and find that the thermally assisted spin torque results in new aspects of the magnetization dynamics. In…

Mesoscale and Nanoscale Physics · Physics 2013-11-14 L. Chotorlishvili , Z. Toklikishvili , A. Sukhov , P. P. Horley , V. K. Dugaev , V. R. Vieira , S. Trimper , J. Berakdar

We calculate the temperature of a ferromagnetic transition in a double-exchange model with classical core spins for arbitrary relation between Hund exchange coupling and electron band width by solving the Dynamical Mean Field Approximation…

Statistical Mechanics · Physics 2016-08-31 Eugene Kogan , Mark Auslender , Eran Dgani

We investigate spin and thermal transport near the N\'{e}el transition temperature $T_N$ in three dimensions, by numerically analyzing the classical antiferromagnetic $XXZ$ model on the cubic lattice, where in the model, the anisotropy of…

Strongly Correlated Electrons · Physics 2022-12-09 Kazushi Aoyama

We predict an additional thermal transport pathway across metal/non-metal interfaces with large electron-phonon non-equilibrium via evanescent radiative heat transfer. In such systems, electron scattering processes vary drastically and can…

Mesoscale and Nanoscale Physics · Physics 2025-04-21 William D. Hutchins , Saman Zare , Mehran Habibzadeh , Sheila Edalatpour , Patrick E. Hopkins

We investigate theoretically magnon-mediated superconductivity in a heterostructure consisting of a normal metal and a two-sublattice antiferromagnetic insulator. The attractive electron-electron pairing interaction is caused by an…

Superconductivity · Physics 2019-10-02 Eirik Erlandsen , Akashdeep Kamra , Arne Brataas , Asle Sudbø

One of the main goals of spintronics is to improve transport of information carriers and to achieve new functionalities with ultra-low dissipation. A most promising strategy for this holy grail is to use pure magnon currents created and…

Mesoscale and Nanoscale Physics · Physics 2015-11-04 Kouki Nakata , Pascal Simon , Daniel Loss

Spin and orbital angular momentum of light plays a central role in quantum nanophotonics as well as topological electrodynamics. Here, we show that the thermal radiation from finite-sized bodies comprising of nonreciprocal magneto-optical…

Optics · Physics 2021-06-16 Xingyu Gao , Chinmay Khandekar , Zubin Jacob , Tongcang Li

The thermal spin-transfer torque (TSTT) is an effect to switch the magnetic free layer in a magnetic tunnel junction by a temperature gradient only. We present ab initio calculations of the TSTT. In particular, we discuss the influence of…

Mesoscale and Nanoscale Physics · Physics 2015-06-17 Christian Heiliger , Michael Czerner

Hill et al. have recently measured both the thermal and charge conductivities in the normal state of a high temperature superconductor. Based on the vanishing of the Wiedemann-Franz ratio in the extrapolated zero temperature limit, they…

Superconductivity · Physics 2009-10-31 Qimiao Si

We report a study of the low-temperature heat transport in the quasi-one-dimensional S = 1/2 alternating antiferromagnetic-ferromagnetic chain compound (CH_{3})_{2}NH_{2}CuCl_{3}. Both the temperature and magnetic-field dependencies of…

Strongly Correlated Electrons · Physics 2011-10-20 L. M. Chen , X. M. Wang , W. P. Ke , Z. Y. Zhao , X. G. Liu , C. Fan , Q. J. Li , X. Zhao , X. F. Sun

We study coherent spin transport through helical edge states of topological insulator tunnel-coupled to metallic leads. We demonstrate that unpolarized incoming electron beam acquires finite polarization after transmission through such a…

Mesoscale and Nanoscale Physics · Physics 2021-11-10 R. A. Niyazov , D. N. Aristov , V. Yu. Kachorovskii

Thermoelectric phenomena in magnetic materials present tantalizing possibilities for manipulating spin-information using heat in future 'spin caloritronic' devices. Key to unraveling their underlying physics is to understand spin-lattice…

We develop a Green's function formalism for spin transport through heterostructures that contain metallic leads and insulating ferromagnets. While this formalism in principle allows for the inclusion of various magnonic interactions, we…

Mesoscale and Nanoscale Physics · Physics 2017-11-22 Jiansen Zheng , Scott Bender , Jogundas Armaitis , Roberto E. Troncoso , R. A. Duine

We have used the Kubo formula to calculate the temperature dependence of the electrical conductance of the double exchange Hamiltonian. We average the conductance over an statistical ensemble of clusters, which are obtained by performing…

Strongly Correlated Electrons · Physics 2009-10-31 M. J. Calderón , J. A. Vergés , L. Brey

The transport of spin information has been studied in various materials, such as metals, semiconductors and graphene. In these materials, spin is transported by diffusion of conduction electrons. Here we study the diffusion and relaxation…

Mesoscale and Nanoscale Physics · Physics 2015-12-08 L. J. Cornelissen , J. Liu , R. A. Duine , J. Ben Youssef , B. J. Van Wees
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