Fluctuation Spectroscopy of Hot Electrons in Semiconductors

Bareikis, V.; Katilius, R.; Pozhela, Juras; Gantsevich, S. V.; Гуревич, В. Л.

doi:10.1016/b978-0-444-89637-7.50013-2

Cited by 11 publications

(10 citation statements)

References 37 publications

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“…Ultimately we are interested in the total spin correlation function, S z (t)S z (t + τ ) , where we assume the probe beam to propagate along z direction. Since a correlator of any physical quantity obeys the same linear kinetic equation as the quantity itself [3,4,22], the spin correlation function for τ > 0 can be presented in the form δS z (t)δS z (t + τ )…”

Section: Spin Noisementioning

confidence: 99%

“…A semiconductor laser in p-Ge has been realized based on the streaming effect [2]. Many interesting features can be revealed by studying the electric current fluctuations in the streaming regime [3,4]. Recent theoretical investigations of streaming in two-dimensional systems demonstrate collective wave-like excitations of the electrons with multibranch spectra and considerable spatial dispersion [5].…”

Section: Introductionmentioning

confidence: 99%

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Spin dynamics and fluctuations in the streaming regime

Smirnov

Golub

2015

Phys. Rev. B

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Spin dynamics of two-dimensional electrons in moderate in-plane electric fields is studied theoretically. The streaming regime is considered, where each electron accelerates until reaching the optical phonon energy, then it emits an optical phonon, and a new period of acceleration starts. Spin-orbit interaction and elastic scattering result in anisotropic relaxation of electron spin polarization. The overall spin dynamics is described by a superposition of spin modes in the system. The relaxation time of the most long-living mode depends quasi-periodically on the inverse electric field. The spin modes can be conveniently revealed by means of spin noise spectroscopy. It is demonstrated that the spectrum of spin fluctuations consists of peaks with the low-frequency peak much narrower than satellite ones, and the widths of the peaks are determined by the decay times of the modes.Comment: 9 pages, 5 figure

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Section: Spin Noisementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Spin dynamics and fluctuations in the streaming regime

Smirnov

Golub

2015

Phys. Rev. B

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“…Equilibrium phonons have been studied through fluctuations of scattered light 4 . When electrons and phonons are displaced from thermal equilibrium, fluctuations acquire additional features, and complementary information is obtained 5 . In particular, time constants of electron energy relaxation and intervalley transfer have been determined from hot-electron fluctuations.…”

Section: Introductionmentioning

confidence: 99%

Fluctuations and Ultrafast Processes in Voltage-Biased Two-Dimensional Channels

Matulionis¹

2009

Selected Topics in Electronics and Systems

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Hot-electron fluctuation techniques were developed for experimental investigation of picosecond and subpicosecond electronic and phononic processes in voltage-biased 2DEG channels of interest for microwave low-noise and high-power transistors. Examples illustrate real-space transfer, hotelectron energy relaxation, and occupancy relaxation of hot-phonon modes. The pioneering results on hot-electron energy relaxation and hot-phonon lifetime are confirmed by time-resolved response experiments. The fluctuation technique for measuring the hot-phonon lifetime as a function of the hot-phonon temperature is unique, no datum has been reported for comparison as yet.

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“…The method outlined here can be easily extended for the case of localized electrons, where the electron-electron interaction is not important, while the hyperfine coupling of electron and host lattice nuclear spins plays a role. This method can be also used to calculate valley polarization and coherence fluctuations in multivalley semiconductors and nanosystems [34,35].…”

Section: Introductionmentioning

confidence: 99%

Spin fluctuations of nonequilibrium electrons and excitons in semiconductors

Glazov

2016

J. Exp. Theor. Phys.

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Effects related with deviations from thermodynamic equilibrium take a special place in the modern physics. Among those, non-equilibrium phenomena in quantum systems attract the highest interest. To date, the experimental technique of spin noise spectroscopy has became quite widespread, which makes possible to observe spin fluctuations of charge carriers in semiconductors both in equilibrium and non-equilibrium conditions. It calls for development of the theory of spin fluctuations of electrons and electron-hole complexes for non-equilibrium conditions. In this paper we consider a range of physical situations where a deviation from an equilibrium becomes pronounced in the spin noise. A general method of calculation of electron and exciton spin fluctuations in non-equilibrium state is proposed. A short review of theoretical and experimental results in this area is given. PACS numbers: 72.25.Rb,74.25.nd

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Fluctuation Spectroscopy of Hot Electrons in Semiconductors

Cited by 11 publications

References 37 publications

Spin dynamics and fluctuations in the streaming regime

Spin dynamics and fluctuations in the streaming regime

Fluctuations and Ultrafast Processes in Voltage-Biased Two-Dimensional Channels

Spin fluctuations of nonequilibrium electrons and excitons in semiconductors

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