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We employ the spin absorption technique in lateral spin valves to extract the spin diffusion length of Permalloy (Py) as a function of temperature and resistivity. A linear dependence of the spin diffusion length with conductivity of Py is…

Mesoscale and Nanoscale Physics · Physics 2019-04-04 Edurne Sagasta , Yasutomo Omori , Miren Isasa , YoshiChika Otani , Luis E. Hueso , Fèlix Casanova

Using fully kinetic 3D simulations, the reconnection dynamics of asymmetric current sheets are examined at the Earth's magnetopause. The plasma parameters are selected to model MMS magnetopause diffusion region crossings with guide fields…

We report calculations of spin relaxation dynamics of two-dimensional electron gas with spin-orbit interaction at the edge region. It is found that the relaxation of spin polarization near the edge is more slow than relaxation in the bulk.…

Mesoscale and Nanoscale Physics · Physics 2016-08-31 Yuriy V. Pershin

We investigate spin transport in InSb/InAlSb heterostructure using the Monte Carlo approach, generalized by including density matrix description of spin for taking spin dynamics into account. In addition to the dominant Dyakonov-Perel (DP)…

Mesoscale and Nanoscale Physics · Physics 2015-05-19 Akashdeep Kamra , Bahniman Ghosh , Tarun K. Ghosh

We study the spin-relaxation time in materials where a large spin-orbit coupling (SOC) is present which breaks the spatial inversion symmetry. Such a spin-orbit coupling is realized in zincblende structures and heterostructures with a…

Strongly Correlated Electrons · Physics 2017-10-23 Lénárd Szolnoki , Annamária Kiss , Balázs Dóra , Ferenc Simon

We study high temperature spin transport in a disordered Heisenberg chain in the ergodic regime when bulk dephasing is present. We find that while dephasing always renders the transport diffusive, there is nonetheless a remnant of the…

Disordered Systems and Neural Networks · Physics 2017-07-19 Marko Žnidarič , Juan Jose Mendoza-Arenas , Stephen R. Clark , John Goold

This is an addendum to the paper "Some models of spin coherence and decoherence in storage rings" by one of the authors [1] in which spin diffusion in simple electron storage rings is studied. In particular, we illustrate in a compact way,…

Accelerator Physics · Physics 2015-08-24 D. P. Barber , K. Heinemann

We address the nature of spin transport in the integrable XXZ spin chain, focusing on the isotropic Heisenberg limit. We calculate the diffusion constant using a kinetic picture based on generalized hydrodynamics combined with Gaussian…

Statistical Mechanics · Physics 2019-04-02 Sarang Gopalakrishnan , Romain Vasseur

We study evolution of electron spin coherence having non-homogeneous direction of spin polarization vector in semiconductor heterostructures. It is found that the electron spin relaxation time due to the D'yakonov-Perel' relaxation…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 Yuriy V. Pershin

We discuss analogies between the charge- and spin response functions of itinerant magnets. We show that the spin-analog of the charge stiffness is not given by the usual spin stiffness rho_s, but by the dynamic spin stiffness D_s, which is…

Strongly Correlated Electrons · Physics 2009-10-30 Peter Kopietz

Spintronic devices usually rely on long spin relaxation times and/or lengths for optimum performance. Therefore, the ability to modulate these quantities with an external agent offers unique possibilities. The dominant spin relaxation…

Mesoscale and Nanoscale Physics · Physics 2015-07-30 Md. Iftekhar Hossain , Saumil Bandyopadhyay , Jayasimha Atulasimha , Supriyo Bandyopadhyay

Designing new quantum materials with long-lived electron spin states urgently requires a general theoretical formalism and computational technique to reliably predict intrinsic spin relaxation times. We present a new, accurate and universal…

Materials Science · Physics 2020-07-01 Junqing Xu , Adela Habib , Sushant Kumar , Feng Wu , Ravishankar Sundararaman , Yuan Ping

Optical pump-probe measurements of spin-dynamics at temperatures down to 1.5K are described for a series of (001)-oriented GaAs/AlGaAs quantum well samples containing high mobility two-dimensional electron gases (2DEGs). For well widths…

Other Condensed Matter · Physics 2009-11-13 W. J. H. Leyland , R. T. Harley , M. Henini , D. Taylor , A. J. Shields , I. Farrer , D. A. Ritchie

The electron transport in a 1D conductor with an isolated local defect such as an impurity or a non-adiabatic contact is studied theoretically. New regime of conduction in correlated 1D systems is predicted beyond the well-known regime of…

Strongly Correlated Electrons · Physics 2015-10-01 S. N. Artemenko , P. P. Aseev , D. S. Shapiro , R. R. Vakhitov

The dynamics of non-equilibrium spin accumulation generated in metals or semiconductors by rf magnetic field pumping is treated within a diffusive picture. The dc spin accumulation produced in a uniform system by a rotating applied magnetic…

Mesoscale and Nanoscale Physics · Physics 2009-11-11 S. M. Watts , J. Grollier , C. H. van der Wal , B. J. van Wees

We describe a broadly-applicable theory of spin relaxation in materials with incoherent charge transport; examples include amorphous inorganic semiconductors, organic semiconductors, quantum dot arrays, and systems displaying…

Disordered Systems and Neural Networks · Physics 2014-10-21 Nicholas J. Harmon , Michael E. Flatté

Finite-temperature spin transport in integrable isotropic spin chains (i.e., spin chains with continuous nonabelian symmetries) is known to be superdiffusive, with anomalous transport properties displaying remarkable robustness to isotropic…

Statistical Mechanics · Physics 2024-12-10 Catherine McCarthy , Sarang Gopalakrishnan , Romain Vasseur

We analyze the spin transport through a finite-size one-dimensional interacting wire connected to noninteracting leads. By combining renormalization-group arguments with other analytic considerations such as the memory function technique…

Quantum Gases · Physics 2020-04-28 A. -M. Visuri , M. Lebrat , S. Häusler , L. Corman , T. Giamarchi

We present a numerical study of the diffusion of energy at high temperature in strongly disordered chains of interacting classical spins evolving deterministically. We find that quenched randomness strongly suppresses transport, with the…

Strongly Correlated Electrons · Physics 2013-05-29 Vadim Oganesyan , Arijeet Pal , David A. Huse

We present a combined theory-experiment study to quantify spin diffusion in the square lattice quantum spin-1/2 XY model at finite temperature. On the theory side, we leverage a recently developed dynamical high-temperature expansion method…