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Two-dimensional electron–acoustic-phonon interaction at high magnetic fields: Thermal conductance in GaAs/AlxGa1-xAs heterostructures
| Title: | Two-dimensional electron–acoustic-phonon interaction at high magnetic fields: Thermal conductance in GaAs/AlxGa1-xAs heterostructures |
| Authors: | Tamura, S.1 Browse this author →KAKEN DB | | Kitagawa, H. Browse this author |
| Authors(alt): | 田村, 信一朗1 |
| Issue Date: | 15-Oct-1989 |
| Publisher: | American Physical Society |
| Journal Title: | Physical Review B |
| Volume: | 40 |
| Issue: | 12 |
| Start Page: | 8485 |
| End Page: | 8489 |
| Publisher DOI: | 10.1103/PhysRevB.40.8485 |
| Abstract: | 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. |
| Rights: | Copyright © 1989 American Physical Society |
| Relation: | http://www.aps.org/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/5947 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 田村 信一朗
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