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We study the onset of spin superfluidity, namely coherent spin transport mediated by a topological spin texture, in frustrated exchange-dominated magnetic systems, engendered by an external magnetic field. We show that for typical device…

Mesoscale and Nanoscale Physics · Physics 2021-05-26 Ricardo Zarzuela , Daniel Hill , Jairo Sinova , Yaroslav Tserkovnyak

N\'eel magnetic domain walls that are stabilized by achiral energy terms instead of the usual Dzyaloshinskii-Moriya interaction will be bistable, with the two possible chiral forms being degenerate. Here we focus on the theoretical study of…

Mesoscale and Nanoscale Physics · Physics 2023-09-14 Eloi Haltz , Kévin J. A. Franke , Christopher H. Marrows

We investigate spin dependent transport in hybrid superconductor(S)--normal-metal(N)--ferromagnet(F) structures under conditions of proximity effect. We demonstrate the feasibility of the absolute spin-valve effect for a certain interval of…

Mesoscale and Nanoscale Physics · Physics 2009-11-07 Daniel Huertas-Hernando , Yu. V. Nazarov , W. Belzig

The charge and spin diffusion equations taking into account spin-flip and spin-transfer torque were numerically solved using a finite element method in complex non-collinear geometry with strongly inhomogeneous current flow. As an…

Mesoscale and Nanoscale Physics · Physics 2011-07-14 N. Strelkov , A. Vedyayev , N. Ryzhanova , D. Gusakova , L. D. Buda-Prejbeanu , M. Chshiev , S. Amara , N. de Mestier , C. Baraduc , B. Dieny

Spintronic phenomena to date have been established in magnets with collinear moments, where the spin injection through the spin Seebeck effect (SSE) is always along the out-of-plane direction. Here, we report the observation of a vector SSE…

Materials Science · Physics 2022-10-14 Jinsong Xu , Jiaming He , J. -S. Zhou , Danru Qu , Ssu-Yen Huang , C. L. Chien

The interplay between spin reorientation and topological electronic structure in two-dimensional (2D) van der Waals (vdW) ferromagnets is central to understanding how magnetic anisotropy shapes charge transport. Although spin-reorientation…

We present a theory of spinor superfluidity in a two-species heteronuclear ultracold fermionic atomic gas consisting of arbitrary half-integer spin and one-half spin atoms. In particular, we focus on the magnetism of the superfluid phase…

Statistical Mechanics · Physics 2009-11-13 D. B. M. Dickerscheid , Y. Kawaguchi , M. Ueda

The existence of the magnetostatic surface spin waves in ferromagnets, known as Damon-Eshbach mode, was recently demonstrated to originate from the topology of the dipole-dipole interaction. In this work, we study the topological…

Mesoscale and Nanoscale Physics · Physics 2020-07-01 Jie Liu , Lin Wang , Ka Shen

A magnetic field is generally considered to be incompatible with superconductivity as it tends to spin-polarize electrons and breaks apart the opposite-spin singlet superconducting Cooper pairs. Here, an experimental phenomenon is observed…

Superconductivity · Physics 2020-11-06 Da Jiang , Tianzhong Yuan , Yongzheng Wu , Xinyuan Wei , Gang Mu , Zhenghua An , Wei Li

Antiferromagnetic (AFM) spintronics exploits the N\'eel vector as a state variable for novel spintronic devices. Recent studies have shown that the field-like and antidamping spin-orbit torques (SOT) can be used to switch the N\'eel vector…

Materials Science · Physics 2020-02-18 Ding-Fu Shao , Shu-Hui Zhang , Gautam Gurung , Wen Yang , Evgeny Y. Tsymbal

We experimentally investigate magnetoresistance of a single GeTe-Ni junction between the $\alpha$-GeTe topological semimetal and thick nickel film at room and liquid helium temperatures. For the magnetic field parallel to the junction…

Mesoscale and Nanoscale Physics · Physics 2025-05-08 A. A. Avakyants , V. D. Esin , D. Yu. Kazmin , N. N. Orlova , A. V. Timonina , N. N. Kolesnikov , E. V. Deviatov

Motivated by a recent experiment in ultracold atoms [ S. Krinner et al., Proc. Natl. Acad. Sci. U.S.A 113, 8144 (2016)], we analyze transport of attractively interacting fermions through a one-dimensional wire near the superfluid…

Quantum Gases · Physics 2017-05-12 Shun Uchino , Masahito Ueda

Spin-momentum locking plays a fundamental role in spintronics and, more broadly, is an important concept in condensed matter physics. In 2D and 3D, spin-momentum locking typically does not allow spin-conservation because the spin-1/2…

Mesoscale and Nanoscale Physics · Physics 2026-02-05 Yoonseok Hwang , Penghao Zhu , Taylor L. Hughes

The ability to switch magnetic elements by spin-orbit-induced torques has recently attracted much attention for a path towards high-performance, non-volatile memories with low power consumption. Realizing efficient spin-orbit-based…

Materials Science · Physics 2020-07-01 Shiheng Liang , Shuyuan Shi , Chuang-Han Hsu , Kaiming Cai , Yi Wang , Pan He , Yang Wu , Vitor M. Pereira , Hyunsoo Yang

Within the s-d model description, we derive the current-driven spin torque in a ferromagnet, taking explicitly into account a spin-relaxing Caldeira-Leggett bath coupling to the s-electrons. We derive Bloch-Redfield equations of motion for…

Mesoscale and Nanoscale Physics · Physics 2011-11-10 M. Thorwart , R. Egger

We introduce the general formalism to describe spin torques induced by the supercurrents injected from the adjacent superconducting electrodes into the spin-textured ferromagnets. By considering the adiabatic limit for the equal-spin…

Superconductivity · Physics 2018-08-28 I. V. Bobkova , A. M. Bobkov , M. A. Silaev

Motivated by recent all optical NMR experiments\cite{Awschalom1,Awschalom2} on GaAs quantum wells, we propose new experiments that would involve creating spatially modulated nuclear spin profiles. Due to the hyperfine coupling these would…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 Aditi Mitra , Steven M. Girvin

The N\'eel order of an antiferromagnet subject to a spin torque can undergo precession in a circular orbit about any chosen axis. To orient and stabilize the motion against the effects of magnetic anisotropy, the spin polarization should…

Applied Physics · Physics 2021-02-03 Arun Parthasarathy , Egecan Cogulu , Andrew D. Kent , Shaloo Rakheja

Realization of noncentrosymmetric magnetic Weyl metals is expected to exhibit anomalous transport properties stemming from the interplay of unusual bulk electronic topology and magnetism. Here, we present spin-valve-like magnetoresistance…

Metallic antiferromagnets with broken inversion symmetry on the two sublattices, strong spin-orbit coupling and high N\'{e}el temperatures offer new opportunities for applications in spintronics. Especially Mn$_{2}$Au, with high N\'{e}el…