نتایج جستجو برای: spin orbit coupling

تعداد نتایج: 292799  

Journal: :Physical review letters 2006
Yong Wang Ke Xia Zhao-Bin Su Zhongshui Ma

Based on the Noether's theorem, we develop systematically and rigorously the spin-dependent formulation of the conservation laws. The effect of the electronic polarization due to the spin-orbit coupling is included in the Maxwell equations. The polarization is related to the antisymmetric components of spin current, and it provides a possibility to measure the spin current directly. The varianc...

Journal: :Physical review. B, Condensed matter 1996
Polyakov

We present a microscopic theory of spin-orbit coupling in the integer quantum Hall regime. The spin-orbit scattering length is evaluated in the limit of long-range random potential. The spin-flip rate is shown to be determined by rare fluctuations of anomalously high electric field. A mechanism of strong spin-orbit scattering associated with exchange-induced spontaneous spin-polarization is sug...

2010
F Guinea

The intrinsic spin–orbit interactions in bilayer graphene and in graphite are studied, using a tight binding model and an intra-atomic E LE S coupling. The spin–orbit interactions in bilayer graphene and graphite are larger, by about one order of magnitude, than the interactions in single-layer graphene, due to the mixing of π and σ bands by interlayer hopping. Their values are in the range 0.1...

2016
R. A. Caetano

The use of organic materials in spintronic devices has been seriously considered after recent experimental works have shown unexpected spin-dependent electrical properties. The basis for the confection of any spintronic device is ability of selecting the appropriated spin polarization. In this direction, DNA has been pointed out as a potential candidate for spin selection due to the spin-orbit ...

Journal: :Physical review letters 2016
Valentina Brosco Lara Benfatto Emmanuele Cappelluti Claudio Grimaldi

We discuss the transport properties of a disordered two-dimensional electron gas with strong Rashba spin-orbit coupling. We show that in the high-density regime where the Fermi energy overcomes the energy associated with spin-orbit coupling, dc transport is accurately described by a standard Drude's law, due to a nontrivial compensation between the suppression of backscattering and the relativi...

2006
J. Linder M. S. Grønsleth A. Sudbø

– A system exhibiting multiple simultaneously broken symmetries offers the opportunity to influence physical phenomena such as tunneling currents by means of external control parameters. Time-reversal symmetry and inversion symmetry are both absent in ferromag-netic metals with substantial spin-orbit coupling. We here study transport of spin in a system consisting of two ferromagnets with spin-...

Journal: :Physical chemistry chemical physics : PCCP 2009
Ali Sebetci

We have performed relativistic effective core potential calculations with and without spin-orbit coupling term in the framework of the density functional theory and investigated the geometry and binding energy of different isomers of free platinum clusters Pt(n) (n = 4-6) for the spin multiplicities from singlet to nonet. The spin-orbit coupling effect has been discussed for the minimum-energy ...

Journal: :Physical review letters 2004
Artem M Dudarev Roberto B Diener Iacopo Carusotto Qian Niu

We show how spin-orbit coupling and Berry phase can appear in two-dimensional optical lattices by coupling atoms' internal degrees of freedom to radiation. The Rashba Hamiltonian, a standard description of spin-orbit coupling for two-dimensional electrons, is obtained for the atoms under certain circumstances. We discuss the possibility of observing associated phenomena, such as the anomalous H...

2015
Yixiao Huang Zheng-Da Hu

Recently, strong spin-orbit coupling with equal Rashba and Dresselhaus strength has been realized in neutral atomic Bose-Einstein condensates via a pair of Raman lasers. In this report, we investigate spin and field squeezing of the ground state in spin-orbit coupled Bose-Einstein condensate. By mapping the spin-orbit coupled BEC to the well-known quantum Dicke model, the Dicke type quantum pha...

Journal: :Physical review letters 2012
Lawrence W Cheuk Ariel T Sommer Zoran Hadzibabic Tarik Yefsah Waseem S Bakr Martin W Zwierlein

The coupling of the spin of electrons to their motional state lies at the heart of recently discovered topological phases of matter. Here we create and detect spin-orbit coupling in an atomic Fermi gas, a highly controllable form of quantum degenerate matter. We directly reveal the spin-orbit gap via spin-injection spectroscopy, which characterizes the energy-momentum dispersion and spin compos...

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