Phonon focusing and electron-phonon drag in semiconductor crystals with degenerate charge-carrier statistics / Kuleyev I. G.,Kuleyev I. I.,Bakharev S. M.,Ustinov V. V. // JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS. - 2016. - V. 123, l. 3. - P. 489-505.

ISSN/EISSN:

1063-7761 / 1090-6509

Type:

Article

Abstract:

We study the effect of anisotropy in elastic properties on the electron-phonon drag and thermoelectric phenomena in gapless semiconductors with degenerate charge-carrier statistics. It is shown that phonon focusing leads to a number of new effects in the drag thermopower at low temperatures, when diffusive phonon scattering from the boundaries is the predominant relaxation mechanism. We analyze the effect of phonon focusing on the dependences of the thermoelectromotive force (thermopower) in HgSe:Fe crystals on geometric parameters and the heat-flow directions relative to the crystal axes in the Knudsen regime of the phonon gas flow. The crystallographic directions that ensure the maximum and minimum values of the thermopower are determined and the role of quasi-longitudinal and quasi-transverse phonons in the drag thermopower in HgSe:Fe crystals at low temperatures is analyzed. It is shown that the main contribution to the drag thermopower comes from slow quasi-transverse phonons in the directions of focusing in long samples.

Author keywords:

LATTICE THERMAL-CONDUCTIVITY; BOUNDARY SCATTERING REGIME; LOW-TEMPERATURES; CUBIC-CRYSTALS; SILICON; ANISOTROPY

DOI:

10.1134/S1063776116090053

Web of Science ID:

ISI:000386770200014

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	SEP
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
EISSN	1090-6509
Keywords-Plus	LATTICE THERMAL-CONDUCTIVITY; BOUNDARY SCATTERING REGIME; LOW-TEMPERATURES; CUBIC-CRYSTALS; SILICON; ANISOTROPY
Research-Areas	Physics
Web-of-Science-Categories	Physics, Multidisciplinary
Author-Email	kuleev@imp.uran.ru
ResearcherID-Numbers	Ustinov, Vladimir/G-7501-2011 Bakharev, Sergey/K-1733-2013 Kuleyev, Ivan/K-1742-2013 Menshenina, Irina/L-8600-2013 Kuleyev, Igor/K-2899-2013
ORCID-Numbers	Ustinov, Vladimir/0000-0002-5155-7947 Bakharev, Sergey/0000-0003-2956-8145 Kuleyev, Ivan/0000-0001-9428-6502 Kuleyev, Igor/0000-0001-7182-4558
Funding-Acknowledgement	Spin project; Physics Department of the Russian Academy of Science {[}12-T-2-1018]; Government of the Russian Federation {[}14.Z50.31.0025, 220, 7539.2016.2]
Funding-Text	This study was supported financially within Spin project and the program of the Physics Department of the Russian Academy of Science (project no. 12-T-2-1018) and grant no. 14.Z50.31.0025 in accordance with the resolution no. 220 of the Government of the Russian Federation (grant no. 7539.2016.2).
Number-of-Cited-References	34
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	8
Journal-ISO	J. Exp. Theor. Phys.
Doc-Delivery-Number	EA6WQ