Coherent Propagation of Spin Helices in a Quantum-Well Confined Electron Gas
نویسندگان
چکیده
منابع مشابه
Coherent propagation of spin helices in a quantum-well confined electron gas.
We use phase-resolved transient grating spectroscopy to measure the propagation of spin helices in a high mobility n-GaAs/AlGaAs quantum well with an applied in-plane electric field. At relatively low fields helical modes crossover from overdamped excitations where the spin-precession period exceeds the spin lifetime, to a regime of coherent propagation where several spin-precession periods can...
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1.1 Outline The central conceptual difficulty in standard non-relativistic quantum chemistry, as for relativistic quantum mechanics, remains that in the absence of a satisfactory, physically intelligible representation of the phenomenon of spin, spin is represented in our models as a topological constraint on many-particle interactions. All of chemistry is dominated by the phenomenon of spin-pa...
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We report the experimental realization of coherent electron spin flip in a modulation-doped CdTe quantum well. Coherent spin rotation is realized with an off-resonant laser pulse, which induces a polarization-dependent optical Stark shift in the trion resonance. Complete electron spin flip is made possible by a laser pulse designed to avoid excessive excitations of nearby exciton resonances and...
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T. Arikawa,1,2 X. Wang,1,2 D. J. Hilton,3 J. L. Reno,4 W. Pan,5 and J. Kono1,2,* 1Department of Electrical and Computer Engineering, Rice University, Houston, Texas 77005, USA 2Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA 3Department of Physics, University of Alabama at Birmingham, Birmingham, Alabama 35294, USA 4Center for Integrated Nanotechnologies, Sandia ...
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A fully microscopic theory of electron spin relaxation by the D’yakonov-Perel’ type spin-orbit coupling is developed for a semiconductor quantum well in an ambient magnetic field applied perpendicular to the plane of the well. We derive Bloch equations for an electron spin in the well and determine explicit microscopic expressions for the spin relaxation times. The dependencies of the electron ...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2012
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.109.246603