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We study the optically induced spin polarization, spin dephasing and diffusion in several high-mobility two-dimensional electron systems, which are embedded in GaAs quantum wells grown on (110)-oriented substrates. The experimental…

介观与纳米尺度物理 · 物理学 2015-06-17 R. Voelkl , M. Schwemmer , M. Griesbeck , S. A. Tarasenko , D. Schuh , W. Wegscheider , C. Schueller , T. Korn

In this work, we study thermally-generated spin current in the system consisting of a quantum dot connected to two magnetic insulators. The external leads are kept at different temperatures which leads to an imbalance of magnon populations…

介观与纳米尺度物理 · 物理学 2024-09-20 Emil Siuda , Piotr Trocha

A novel method invented to measure the minute thermodynamic spin magnetization of dilute two dimensional fermions is applied to electrons in a silicon inversion layer. Interplay between the ferromagnetic interaction and disorder enhances…

介观与纳米尺度物理 · 物理学 2009-11-07 O. Prus , Y. Yaish , M. Reznikov , U. Sivan , V. Pudalov

We propose a device acting as a spin valve which is based on a double quantum dot structure with parallel topology. Using the exact analytical solution for the noninteracting case we argue that, at a certain constellation of system…

介观与纳米尺度物理 · 物理学 2010-03-18 J. P. Dahlhaus , S. Maier , A. Komnik

We demonstrate fully electrical detection of spin injection in InAs quantum wells. A spin polarized current is injected from a NiFe thin film to a two-dimensional electron gas (2DEG) made of InAs based epitaxial multi-layers. Injected spins…

介观与纳米尺度物理 · 物理学 2015-06-25 Hyun Cheol Koo , Hyunjung Yi , Jae-Beom Ko , Joonyeon Chang , Suk-Hee Han , Donghwa Jung , Seon-Gu Huh , Jonghwa Eom

We present switching field distributions of spin-transfer assisted magnetization reversal in perpendicularly magnetized Co/Ni multilayer spin-valve nanopillars at room temperature. Switching field measurements of the Co/Ni free layer of…

介观与纳米尺度物理 · 物理学 2014-04-29 D. B. Gopman , D. Bedau , S. Mangin , E. E. Fullerton , J. A. Katine , A. D. Kent

Spin polarization of a two-dimensional electron gas with Rashba spin-orbit interaction, induced by a thermo-current, is considered theoretically. It is shown that a temperature gradient gives rise to an in-plane spin polarization of the…

介观与纳米尺度物理 · 物理学 2013-08-27 A. Dyrdał , M. Inglot , V. K. Dugaev , J. Barnaś

The temperature and voltage dependence of spin transport is theoretically investigated in a new type of magnetic tunnel junction, which consists of two ferromagnetic outer electrodes separated by a ferromagnetic barrier and a nonmagnetic…

介观与纳米尺度物理 · 物理学 2009-11-11 Ali A. Shokri , Alireza Saffarzadeh

We find efficient spin transport in Si at room temperature in lateral spin valves (LSVs). When the crystal orientation of the spin-transport channel in LSVs is changed from $\langle$110$\rangle$, which is a conventional cleavage direction,…

介观与纳米尺度物理 · 物理学 2018-04-19 M. Ishikawa , M. Tsukahara , Y. Fujita , M. Yamada , Y. Saito , T. Kimura , K. Hamaya

We first report the all-electrical spin injection and detection in CoFe/MgO/moderately doped n-Ge contact at room temperature (RT), employing threeterminal Hanle measurements. A sizable spin signal of ~170 k{\Omega} {\mu}m^2 has been…

介观与纳米尺度物理 · 物理学 2015-05-30 Kun-Rok Jeon , Byoung-Chul Min , Young-Hun Jo , Hun-Sung Lee , Il-Jae Shin , Chang-Yup Park , Seung-Young Park , Sung-Chul Shin

Spin-wave (SW) spectra have theoretically been studied in a thin film of a ferromagnet (FM) on a substrate from a paramagnet (PM) (an FM above the critical temperature) or from superconductor (SC). A spin wave propagating in the FM induces…

介观与纳米尺度物理 · 物理学 2022-06-15 M. A. Kuznetsov , A. A. Fraerman

We present a complete description of spin injection and detection in Fe/Al_xGa_{1-x}As/GaAs heterostructures for temperatures from 2 to 295 K. Measurements of the steady-state spin polarization in the semiconductor indicate three…

材料科学 · 物理学 2009-11-10 C. Adelmann , X. Lou , J. Strand , C. J. Palmstrom , P. A. Crowell

We study nonlocal thermoelectricity in a superconducting wire subject to spin-orbit coupling and a magnetic field with a relative orientation $\theta$ between them. We calculate the current flowing in a normal probe attached to the bulk of…

介观与纳米尺度物理 · 物理学 2024-08-19 Juan Herrera Mateos , Leandro Tosi , Alessandro Braggio , Fabio Taddei , Liliana Arrachea

We address the temperature influence on the precessional motion of electron spins under transverse magnetic field, studied in a GaAs/AlGaAs triple quantum wells, using pump-probe Kerr rotation. In the presence of an applied in-plane…

介观与纳米尺度物理 · 物理学 2018-05-18 S. Ullah , F. C. D. Moraes , G. M. Gusev , A. K. Bakarov , F. G. G. Hernandez

We observed spin injection into silicon through Fe/MgO tunnel barrier by using non-local magnetoresistance measurement technique. Fe/MgO tunnel barrier contacts with a lateral spin valve structure were fabricated on phosphorous doped…

Using a metal-oxide-semiconductor field effect transistor (MOSFET) structure with a high-quality CoFe/n^+Si contact, we systematically study spin injection and spin accumulation in a nondegenerated Si channel with a doping density of ~…

材料科学 · 物理学 2013-05-16 K. Hamaya , Y. Ando , K. Masaki , Y. Maeda , Y. Fujita , S. Yamada , K. Sawano , M. Miyao

Coupling between conduction electrons and localized magnetization is responsible for a variety of phenomena in spintronic devices. This coupling enables to generate spin currents from dynamical magnetization. Due to the nonlinearity of…

介观与纳米尺度物理 · 物理学 2015-07-23 Takaharu Tashiro , Saki Matsuura , Akiyo Nomura , Shun Watanabe , Keehoon Kang , Henning Sirringhaus , Kazuya Ando

Electrically detected electron spin resonance (EDESR) signals were acquired as a function of temperature in the 0.3-4.2 K temperature range in a AlGaAs/GaAs multiple quantum well sample at the filling factor at 5.7 T. In the particular…

介观与纳米尺度物理 · 物理学 2009-11-07 Eugene Olshanetsky , Manyam Pilla , Joshua D. Caldwell , Shu-chen Liu , Clifford R. Bowers , Jerry A. Simmons , John L. Reno

We probe spin transport in Cu_{2}O by measuring spin valve effect in La_{0.7}Sr_{0.3}MnO_{3}/Cu_{2}O/Co and La_{0.7}Sr_{0.3}MnO_{3}/Cu_{2}O/La_{0.7}Sr_{0.3}MnO_{3} epitaxial heterostructures. In La_{0.7}Sr_{0.3}MnO_{3}/Cu_{2}O/Co systems we…

介观与纳米尺度物理 · 物理学 2010-04-21 I. Pallecchi , L. Pellegrino , N. Banerjee , M. Cantoni , A. Gadaleta , A. S. Siri , D. Marré

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.…

介观与纳米尺度物理 · 物理学 2013-10-22 Sun-Yong Hwang , Jong Soo Lim , Rosa Lopez , Minchul Lee , David Sanchez