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The spin-phonon interaction is the dominant process for spin relaxation in Si, and as thermal transport in Si is dominated by phonons, one would expect spin polarization to influence Si's thermal conductivity. Here we report the…

介观与纳米尺度物理 · 物理学 2018-09-07 Paul Lou , Laura de Sousa Oliveira , Chi Tang , Alex Greaney , Sandeep Kumar

The entanglement of the charge, spin and orbital degrees of freedom can give rise to emergent behavior especially in thin films, surfaces and interfaces. Often, materials that exhibit those properties require large spin orbit coupling. We…

介观与纳米尺度物理 · 物理学 2018-01-03 Paul C Lou , Sandeep Kumar

Spin current experiences minimal dephasing and scattering in Si due to small spin-orbit coupling and spin-lattice interactions is the primary source of spin relaxation. We hypothesize that if the specimen dimension is of the same order as…

介观与纳米尺度物理 · 物理学 2018-01-03 Paul C Lou , Sandeep Kumar

Silicon's weak intrinsic spin-orbit coupling and centrosymmetric crystal structure are a critical bottleneck to the development of Si spintronics, because they lead to an insignificant spin-Hall effect (spin current generation) and inverse…

介观与纳米尺度物理 · 物理学 2020-04-03 Paul C. Lou , Anand Katailiha , Ravindra G. Bhardwaj , Tonmoy Bhowmick , W. P. Beyermann , Roger K. Lake , Sandeep Kumar

A spin battery concept is applied for the dynamical generation of pure spin current and spin transport in p-type silicon (p-Si). Ferromagnetic resonance and effective s-d coupling in Ni80Fe20 results in spin accumulation at the…

材料科学 · 物理学 2013-01-30 Eiji Shikoh , Kazuya Ando , Eiji Saito , Kazuki Kubo , Teruya Shinjo , Masashi Shiraishi

In this note we summarize our recent results for the temperature dependence of transport coefficients of metallic films in the presence of spin-orbit coupling. Our focus is on (i) the spin Nernst and the thermal Edelstein effects, and (ii)…

介观与纳米尺度物理 · 物理学 2016-09-05 U. Eckern , C. Gorini , R. Raimondi , S. Tölle

In this work, we present an experimental study of spin mediated enhanced negative magnetoresistance in Ni80Fe20 (50 nm)/p-Si (350 nm) bilayer. The resistance measurement shows a reduction of ~2.5% for the bilayer specimen as compared to…

介观与纳米尺度物理 · 物理学 2017-05-08 Paul C Lou , Sandeep Kumar

In this study, we report first experimental evidence of spin-momentum locking in the topological phonons in an inhomogeneously strained Si thin film. The spin-momentum locking in the topological phonons lead to a longitudinal spin texture…

材料科学 · 物理学 2021-10-12 Anand Katailiha , Paul C. Lou , Ravindra G. Bhardwaj , Ward P. Beyermann , Sandeep Kumar

We inject spin-polarized electrons from an Fe/MgO tunnel barrier contact into n-type Ge(001) substrates with electron densities 2e16 < n < 8e17 cm-3, and electrically detect the resulting spin accumulation using three-terminal Hanle…

材料科学 · 物理学 2012-02-20 A. T. Hanbicki , S. -. F. Cheng , R. Goswami , O. M. J. van `t Erve , B. T. Jonker

We have experimentally and theoretically investigated the electron spin transport and spin distribution at room temperature in a Si two-dimensional (2D) inversion channel of back-gate-type spin metal-oxide-semiconductor field-effect…

应用物理 · 物理学 2020-07-22 Shoichi Sato , Masaaki Tanaka , Ryosho Nakane

Using one of the methods of quantum nonequilibrium statistical physics we have investigated the spin transport transverse to the normal metal/ferromagnetic insulator interface in hybrid nanostructures. An approximation of the effective…

介观与纳米尺度物理 · 物理学 2015-06-11 I. I. Lyapilin , M. S. Okorokov , V. V. Ustinov

This article reviews the principles that govern the combined transport of spin, heat, and charge. The extensive thermodynamic quantity associated with spin transport is the magnetization; its Onsager-conjugate force is in general the…

材料科学 · 物理学 2021-06-09 Joseph P. Heremans

Since the discovery of the giant magnetoresistance (GMR) effect the use of the intrinsic angular momentum of the electrons has opened up new spin based device concepts. The two channel model of spin-up and spin-down electrons with…

介观与纳米尺度物理 · 物理学 2014-12-24 F. K. Dejene , J. Flipse , G. E. W. Bauer , B. J. van Wees

We demonstrate spin-accumulation signals controlled by the gate voltage in a metal-oxide-semiconductor field effect transistor structure with a Si channel and a CoFe/$n^{+}$-Si contact at room temperature. Under the application of a…

介观与纳米尺度物理 · 物理学 2012-01-31 Y. Ando , Y. Maeda , K. Kasahara , S. Yamada , K. Masaki , Y. Hoshi , K. Sawano , K. Izunome , A. Sakai , M. Miyao , K. Hamaya

We report the first experimental demonstration of room-temperature spin transport in n-type Ge epilayers grown on a Si(001) substrate. By utilizing spin pumping under ferromagnetic resonance, which inherently endows a spin battery function…

We have studied the evolution of the Spin Hall Effect in the regime where the material size responsible for the spin accumulation is either smaller or larger than the spin diffusion length. Lateral spin valve structures with Pt insertions…

材料科学 · 物理学 2009-11-13 Laurent Vila , Takashi Kimura , YoshiChika Otani

Spin transport of magnonic excitations in uniaxial insulating antiferromagnets (AFs) is investigated. In linear response to spin biasing and a temperature gradient, the spin transport properties of normal-metal--insulating…

介观与纳米尺度物理 · 物理学 2020-02-05 Roberto E. Troncoso , Scott A. Bender , Arne Brataas , Rembert A. Duine

Electronic transport and magnetic properties of Ge1-xMnx/Ge(100) films are investigated as a function of Mn dilution. Depending on x, characteristic temperatures separate different regimes in both properties. Resistivity exhibits an…

材料科学 · 物理学 2007-05-23 N. Pinto , L. Morresi , M. Ficcadenti , R. Murri , F. D'Orazio , F. Lucari , L. Boarino , G. Amato

The magneto-transport properties of nanocomposite C:Co (15 and 40 at.% Co) thin films are investigated. The films were grown by ion beam co-sputtering on thermally oxidized silicon substrates in the temperature range from 200 to 500 degC.…

Thermal transport acts as a powerful tool for studying the excitations and physical properties of insulators, where a charge gap suppresses electronic conduction. Recently, the thermal Hall effect has been observed across various materials,…

介观与纳米尺度物理 · 物理学 2025-07-31 Taekoo Oh
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