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相关论文: The sign of electron g-factor in GaAs(1-x)N(x) mea…

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Similar to nitrogen-vacancy centers in diamond and impurity atoms in silicon, interstitial gallium deep paramagnetic centers in GaAsN have been proven to have useful characteristics for the development of spintronic devices. Among other…

We have measured the spin splitting in single-layer and bilayer graphene by means of tilted magnetic field experiments. Applying the Lifshitz-Kosevich formula for the spin-induced decrease of the Shubnikov de Haas amplitudes with increasing…

We derive exact expressions for the degree of lineal polarization over a resolved or integrated stellar disc due to resonance scattering and the Hanle effect from a dipolar or quadrupolar distribution of magnetic fields. We apply the theory…

太阳与恒星天体物理 · 物理学 2015-06-11 R. Manso Sainz , M. J. Martínez González

The choice of substrate orientation for semiconductor quantum dot circuits offers opportunities for tailoring spintronic properties such as g-factors for specific functionality. In this letter, we demonstrate the operation of a few-electron…

介观与纳米尺度物理 · 物理学 2022-04-20 T. Nakagawa , S. Lamoureux , T. Fujita , J. Ritzmann , A. Ludwig , A. D. Wieck , A. Oiwa , M. Korkusinski , A. Sachrajda , D. G. Austing , L. Gaudreau

We review the existing and present the new results of $\bf kp$ calculations of the electron, hole, and exciton effective $g$-factors in semiconductor nanocrystals of different shape and symmetry. We propose a simple yet accurate method for…

介观与纳米尺度物理 · 物理学 2020-11-24 M. A. Semina , A. A. Golovatenko , A. V. Rodina

The circular polarization of direct gap emission of Ge is studied in optically-excited tensile-strained Ge-on-Si heterostructures as a function of doping and temperature. Owing to the spin-dependent optical selection rules, the radiative…

We investigate the correlation between spin signals measured in three-terminal (3T) geometry by the Hanle effect and the spin accumulation generated in a semiconductor channel in a lateral (Ga,Mn)As/GaAs Esaki diode device. We…

In a bulk GaAs crystal, an unusual magnetoresistance effect, which takes place when a spin-polarized current flows through the sample, was detected. Under conditions of optical pumping of electron spins, an external magnetic field directed…

介观与纳米尺度物理 · 物理学 2023-12-01 M. D. Ragoza , N. V. Kozyrev , S. V. Nekrasov , B. R. Namozov , Yu. G. Kusrayev , N. Bart , A. Ludwig , A. D. Wieck

Longitudinal double-spin asymmetries of charged hadrons with high transverse momentum $p_T$ have been measured in electroproduction using the \hermes\ detector at \hera. Processes involving gluons in the nucleon have been enhanced relative…

高能物理 - 实验 · 物理学 2012-08-03 The HERMES Collaboration , A. Airapetian

We study optical pumping of resident electron spins under resonant excitation of trions in n-type CdTe/(Cd,Mg)Te quantum wells subject to a transverse magnetic field. In contrast to the comprehensively used time-resolved pump-probe…

Electrical spin injection from the Heusler alloy Co_2MnGe into a p-i-n Al_0.1Ga_0.9As/GaAs light emitting diode is demonstrated. A maximum steady-state spin polarization of approximately 13% at 2 K is measured in two types of…

We demonstrate by spin quantum beat spectroscopy that in undoped symmetric (110)-oriented GaAs/AlGaAs single quantum wells even a symmetric spatial envelope wavefunction gives rise to an asymmetric in-plane electron Land\'e-g-factor. The…

介观与纳米尺度物理 · 物理学 2015-05-27 J. Hübner , S. Kunz , S. Oertel , D. Schuh , M. Pochwała , H. T. Duc , J. Förstner , T. Meier , M. Oestreich

Motivated by the recently discovered magnonic Hanle effect in an insulating antiferromagnet [Wimmer et al., Phys. Rev. Lett. 125, 247204 (2020)], we develop a spin transport theory based on low-energy waves of antiferromagnetic N\'eel…

介观与纳米尺度物理 · 物理学 2024-03-07 Eric Kleinherbers , Yaroslav Tserkovnyak

Electrically-induced electron spin polarization is imaged in n-type ZnSe epilayers using Kerr rotation spectroscopy. Despite no evidence for an electrically-induced internal magnetic field, current-induced in-plane spin polarization is…

介观与纳米尺度物理 · 物理学 2007-05-23 N. P. Stern , S. Ghosh , G. Xiang , M. Zhu , N. Samarth , D. D. Awschalom

We report on experiments in which a spin-polarized current is injected from a $GaMnAs$ ferromagnetic electrode into a $GaAs$ quantum well through an AlAs barrier. The resulting spin polarization in the GaAs well is detected by measuring how…

材料科学 · 物理学 2009-11-07 R. Mattana , J. -M. George , H. Jaffres , F. Nguyen Van Dau , A. Fert , B. Lepine , A. Guivarc'h , G. Jezequel

The exciton spin dynamics are investigated both experimentally and theoretically in two-monolayer-thick GaAs/AlAs quantum wells with an indirect band gap and a type-II band alignment. The magnetic-field-induced circular polarization of…

介观与纳米尺度物理 · 物理学 2017-07-14 T. S. Shamirzaev , J. Rautert , D. R. Yakovlev , J. Debus , A. Yu. Gornov , M. M. Glazov , E. L. Ivchenko , M. Bayer

Spins of carriers confined in quantum dots (QDs) are promising candidates for qubits due to their relatively long spin relaxation times. However, the electron spin dephasing, primarily driven by hyperfine interactions with nuclear spins,…

介观与纳米尺度物理 · 物理学 2025-11-25 Maja Wasiluk , Helena Janowska , Anna Musiał , Johann P. Reithmaier , Mohamed Benyoucef , Wojciech Rudno-Rudziński

High-harmonic generation (HHG), a typical nonlinear optical effect, has been actively studied in electron systems such as semiconductors and superconductors. As a natural extension, we theoretically study HHG from electric polarization,…

强关联电子 · 物理学 2020-03-10 Tatsuhiko N. Ikeda , Masahiro Sato

We measure thermodynamic magnetization of a low-disordered, strongly correlated two-dimensional electron system in silicon. Pauli spin susceptibility is observed to grow critically at low electron densities - behavior that is characteristic…

We theoretically study the spin dynamics in antiferromagnets (AFs)under the influence of an electric current. We identify two different sources of spin-transfer torques that stem from uniform (${\boldsymbol v}_n$) and staggered…

介观与纳米尺度物理 · 物理学 2021-10-04 Jotaro J. Nakane , Hiroshi Kohno