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Related papers: Local control of spin flow in weak magnetic fields

200 papers

A novel spin orientation mechanism - dynamic electron spin polarization has been recently suggested in Phys. Rev. Lett. $\mathbf{125}$, 156801 (2020). It takes place for unpolarized optical excitation in weak magnetic fields of the order of…

Mesoscale and Nanoscale Physics · Physics 2021-09-15 T. S. Shamirzaev , A. V. Shumilin , D. S. Smirnov , J. Rautert , D. R. Yakovlev , M. Bayer

We investigate the spin diffusion and transport in a graphene monolayer on SiO$_2$ substrate by means of the microscopic kinetic spin Bloch equation approach. The substrate causes a strong Rashba spin-orbit coupling field $\sim 0.15$ meV,…

Mesoscale and Nanoscale Physics · Physics 2011-07-07 P. Zhang , M. W. Wu

We study experimentally interaction-driven spin oscillations in optical lattices in the presence of an off-resonant microwave field. We show that the energy shift induced by this microwave field can be used to control the spin oscillations…

Other Condensed Matter · Physics 2007-05-23 Fabrice Gerbier , Artur Widera , Simon Foelling , Olaf Mandel , Immanuel Bloch

Spin fluctuations and density fluctuations are studied for a two-component gas of strongly interacting fermions along the BEC-BCS crossover. This is done by in-situ imaging of dispersive speckle patterns. Compressibility and magnetic…

It is shown that in the presence of strong magnetic fields, spin-orbit scattering causes a sharp increase in the effective density of states in the variable-range hopping regime when temperature decreases. This effect leads to an…

Condensed Matter · Physics 2009-10-28 Yigal Meir , Boris L. Altshuler

The spin chemical potential characterizes the tendency of spins to diffuse. Probing the spin chemical potential could provide insight into materials such as magnetic insulators and spin liquids and aid optimization of spintronic devices.…

Spin-polarized transport of photo-electrons in bulk, p-type GaAs is investigated in the Pauli blockade regime. In contrast to usual spin diffusion processes in which the spin polarization decreases with distance traveled due to spin…

Mesoscale and Nanoscale Physics · Physics 2013-12-17 F. Cadiz , D. Paget , A. C. H. Rowe

Using an ultra sensitive magneto-optical Kerr rotation setup we have observed electrical spin injection from (Zn,Mn)Se into bulk GaAs and quantified the spin injection efficiency. The current induced contribution was carefully separated…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 A. V. Kimel , A. Kirilyuk , P. Grabs , F. Lehmann , A. A. Tsvetkov , G. Schmidt , L. W. Molenkamp , Th. Rasing

Hybrid quantum systems exhibiting coupled optical, spin, and mechanical degrees of freedom can serve as a platform for sensing, or as a bus to mediate interactions between qubits with disparate energy scales. These systems are also creating…

Quantum Physics · Physics 2020-01-08 Pablo R. Zangara , Alexander Wood , Marcus W. Doherty , Carlos. A. Meriles

Using a novel technique, we make quantitative measurements of the spin polarization of dilute (3.4 to 6.8*10^{10} cm^{-2}) GaAs (311)A two-dimensional holes as a function of an in-plane magnetic field. As the field is increased the system…

Mesoscale and Nanoscale Physics · Physics 2009-10-31 E. Tutuc , E. P. De Poortere , S. J. Papadakis , M. Shayegan

We describe excitation of dipole-exchange spin waves in insulating magnetic thin films by spin current injection at the surface of the film. An easy-axis magnetic surface anisotropy can induce a non-chiral surface spin wave mode with…

Materials Science · Physics 2013-05-10 Jiang Xiao , Yan Zhou , Gerrit E. W. Bauer

We report direct measurements of the spin-orbit interaction induced spin-splitting in a modulation-doped GaAs two-dimensional hole system as a function of anisotropic, in-plane strain. The change in spin-subband densities reveals a…

Mesoscale and Nanoscale Physics · Physics 2015-06-25 B. Habib , J. Shabani , E. P. De Poortere , M. Shayegan , R. Winkler

We theoretically describe the phenomenon of non-adiabatic spin dynamics, which occurs in a gas cell filled by alkali vapor in presence of a strong alternating magnetic field and pump light. Steep increase of the spin polarization occurs if…

Quantum Physics · Physics 2024-03-21 E. N. Popov , A. A. Gaidash , A. V. Kozubov , S. P. Voskoboynikov

We develop an extended pump-probe Faraday rotation technique to study the submicrosecond electron spin dynamics with picosecond time resolution in a wide range of magnetic fields. The electron spin dephasing time $T_2^*$ and the…

Mesoscale and Nanoscale Physics · Physics 2017-09-01 V. V. Belykh , E. Evers , D. R. Yakovlev , F. Fobbe , A. Greilich , M. Bayer

We investigate the evolution of transverse spin in tightly focused circularly polarized beams of light, where spin-orbit coupling causes a local rotation of the polarization ellipses upon propagation through the focal volume. The effect can…

Optics · Physics 2019-12-11 Jörg S. Eismann , Peter Banzer , Martin Neugebauer

We report measurements and calculations of the spin-subband depopulation, induced by a parallel magnetic field, of dilute GaAs two-dimensional (2D) hole systems. The results reveal that the shape of the confining potential dramatically…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 R. Winkler , E. Tutuc , S. J. Papadakis , S. Melinte , M. Shayegan , D. Wasserman , S. A. Lyon

Spin transport experiments in graphene, a single layer of carbon atoms, indicate spin relaxation times that are significantly shorter than the theoretical predictions. We investigate experimentally whether these short spin relaxation times…

Mesoscale and Nanoscale Physics · Physics 2015-05-13 M. Popinciuc , C. Józsa , P. J. Zomer , N. Tombros , A. Veligura , H. T. Jonkman , B. J. van Wees

We present new mechanism for manipulation of the spin-wave amplitude through the use of the dynamic charge-mediated magnetoelectric effect in ultrathin multilayers composed of dielectric thin-film capacitors separated by a ferromagnetic…

Mesoscale and Nanoscale Physics · Physics 2020-01-22 Piotr Graczyk , Maciej Krawczyk

We theoretically investigate photoinduced phenomena induced by time-periodic driving fields in two-dimensional electron gases under perpendicular magnetic fields with Rashba spin-orbit coupling. Using perturbation theory, we provide…

Mesoscale and Nanoscale Physics · Physics 2020-10-23 Daniel Hernangómez-Pérez , Juan Daniel Torres , Alexander López

A central prospect of antiferromagnetic spintronics is to exploit magnetic properties that are unavailable with ferromagnets. However, this poses the challenge of accessing such properties for readout and control. To this end, light-induced…