Two-dimensional electron–acoustic-phonon interaction at high magnetic fields: Thermal conductance in GaAs/AlxGa1-xAs heterostructures

Tamura, S.; Kitagawa, H.

Physical Review B, 1989, 40(12), 8485-8489

Permalink : https://hdl.handle.net/2115/5947

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アクセス権	open access
URI	https://hdl.handle.net/2115/5947
タイトル	Two-dimensional electron–acoustic-phonon interaction at high magnetic fields: Thermal conductance in GaAs/AlxGa1-xAs heterostructures
著者	e-Rad_Researcher 80109488 著者名 Tamura, S. 田村, 信一朗
著者	著者名 Kitagawa, H.
言語	英語
発行日	1989-10-15
出版者	American Physical Society
収録物名	Physical Review B
巻(号)	40(12)
ページ	8485-8489
抄録	Magneto-oscillations of thermal conductance observed recently by Eisenstein, Gossard, and Narayanamurti in GaAs/AlxGa1-xAs heterostructures at low temperatures are studied theoretically. We calculate the thermal-phonon lifetime limited by the scattering with Landau-quantized electrons at high magnetic fields. The calculation includes (i) both piezoelectric and deformation-potential couplings as the sources of electron-phonon interaction, (ii) Landau-level broadening with a Gaussian profile function, and (iii) magnetic-field-dependent screening effects. The results are compared favorably with the experimental data. In particular, the screening effects are crucial to explain both the magnetic field and temperature dependences of the observed thermal conductance.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	Copyright © 1989 American Physical Society
PISSN	0163-1829
関連情報	URI http://www.aps.org/
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.1103/PhysRevB.40.8485