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Article
Manifestation of Dipole-Dipole and Quadrupole Interactions in the Correlator Spectrum of Optically Cooled Nuclear Spins of a Bulk n-Gaas Sample
In this work, we measured the correlator spectrum of optically cooled nuclear spin system of a bulk n-GaAs crystal in a zero magnetic field. The resulting spectrum is described by two contours, which can be inter...
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Article
Compass in the ear: can animals sense magnetic fields with hair cells?
The possibility of realization of magnetoreception in vertebrates with chains of magnetite nanocrystals (magnetosomes) attached to hair cells of the inner ear is evaluated. To this end, statistical mechanics i...
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Article
Electron Spin Relaxation and Resonant Cooling of Nuclear Spins in GaAs:Mn Structures
The behavior of the electron spin relaxation time in bulk GaAs layers doped with Mn was studied experimentally. We investigated the dependence of the degree of circular polarization of photoluminescence in tra...
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Article
Determination of the Quadrupole Splitting in Bulk n-GaAs by Warm-Up Spectroscopy
We found bulk n-GaAs layers grown by liquid phase epitaxy to be irregularly stressed. Deformation created by this stress causes a small but detectable quadrupole splitting of Zeeman nuclear energy levels. In our ...
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Article
Relationship between Avian Magnetic Compass and Photoreception: Hypotheses and Unresolved Questions
The existence of a magnetic compass system allowing animals to maintain the direction of their migratory journeys was first shown in birds about fifty years ago. Over the past half century, a large amount of i...
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Article
On the Suppression of Electron-Hole Exchange Interaction in a Reservoir of Nonradiative Excitons
Mechanisms of the suppression of the electron-hole exchange interaction in nonradiative excitons with a large in-plane wave vector in high-quality heterostructures with quantum wells are analyzed theoretically...
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Article
Magnetoreception in the Retina of the Domestic Pigeon Columbia livia: a Retinographic Search
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Chapter
Dynamic Nuclear Polarization and Nuclear Fields
The optical polarization of nuclear spins may develop in a semiconductor when it is illuminated by circularly polarized light (Lampel, Phys. Rev. Lett. 20, 491, 1968, [1], Optical orientation, 1984, [2]). The ult...
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Article
Controlled switching between quantum states in the exciton–polariton condensate
Optically controlled switching between modes of a polariton laser having different symmetries has been demonstrated experimentally. The microscopic shift of the optical excitation spot dramatically changes the...
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Article
Dynamics of carrier recombination in a semiconductor laser structure
Carrier-recombination dynamics is studied by the method of optical orientation at room temperature in the active layer of a laser diode structure. The dependence of the degree of electron-spin orientation on t...
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Article
Nuclear Spin relaxation mediated by Fermi-edge electrons in n-type GaAs
A method based on the optical orientation technique was developed to measure the nuclear-spin lattice relaxation time T 1 in semiconductors. It was applied to bulk n-type GaAs, where T ...
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Article
Mixing of states in quantum wells for terahertz polariton emitters
Two possible InGaAs/GaAs quantum-well structures ensuring the presence of radiative transitions between the polariton states in a microresonator with a quantum well, which are accompanied by generation of tera...
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Article
Structural analysis of strained quantum dots using nuclear magnetic resonance
Strained semiconductor nanostructures can be used to make single-photon sources1, detectors2 and photovoltaic devices3, and could potentially be used to create quantum logic devices4,5. The development of such ap...
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Article
Fast control of nuclear spin polarization in an optically pumped single quantum dot
The interaction between electron and nuclear spins in quantum dots is often seen as detrimental for the use of electron spin for quantum information processing. It is now shown, however, that such interaction ...
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Article
Spin-orbit terms in multi-subband electron systems: a bridge between bulk and two-dimensional Hamiltonians
We analyze the spin-orbit terms in multi-subband quasi-two-dimensional electron systems, and how they descend from the bulk Hamiltonian of the conduction band. Measurements of spin-orbit terms in one subband a...
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Chapter
Dynamic Nuclear Polarization and Nuclear Fields
The optical polarization of nuclear spins may develop in a semiconductor when it is illuminated by circularly polarized light [1, 2]. The ultimate reason of this phenomenon is the hyperfine interaction of electro...
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Article
Spin polarization dynamics and the Hanle effect for a strong exchange interaction in the exciton
The exciton spin dynamics in a quantum well with a magnetic field applied in its plane is analyzed theoretically. The exchange interaction between the electron and the hole is assumed to be strong. The width o...
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Article
The hanle effect in nonuniformly doped GaAs
Spin density distribution in the GaAs/AlGaAs heterostructure was studied under steady-state optical orientation conditions. A comprehensive analysis of the dynamics and relaxation processes responsible for the...
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Article
Nonradiative recombination and kinetics of optically oriented electrons at the GaAs/AlGaAs interface
It is shown that optical orientation of electron spins in semiconductors can be used as a basis to develop a high-sensitivity method for measuring the dependence of the lifetime of carriers on their concentrat...
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Article
The anomalous Hanle effect in semimagnetic semiconductor quantum wells
The behavior of the optical-orientation signal under resonant optical excitation of localized excitons in quantum wells with semimagnetic layers was studied both experimentally and theoretically. The most rema...
