Generation of coherent confined acoustic phonons by drifting electrons in quantum wire
We developed a quantum theory of generation of coherent confined acoustic phonons by one-dimensional electrons drifting in a quantum wire. A general formula for the factor of amplification of the phonon flux, α, is derived. When the electron drift velocity, Vd, is greater than the sound phase veloci...
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| Published in: | Semiconductor Physics Quantum Electronics & Optoelectronics |
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| Date: | 2000 |
| Main Authors: | , |
| Format: | Article |
| Language: | English |
| Published: |
Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України
2000
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| Online Access: | https://nasplib.isofts.kiev.ua/handle/123456789/121217 |
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| Journal Title: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Cite this: | Generation of coherent confined acoustic phonons by drifting electrons in quantum wire / A.A. Demidenko, V.A. Kochelap // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2000. — Т. 3, № 4. — С. 432-437. — Бібліогр.: 13 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| Summary: | We developed a quantum theory of generation of coherent confined acoustic phonons by one-dimensional electrons drifting in a quantum wire. A general formula for the factor of amplification of the phonon flux, α, is derived. When the electron drift velocity, Vd, is greater than the sound phase velocity, S, then at low temperatures the above generation occurs only in a narrow range of phonon wave vectors, q ~ 2kF[1 ± (Vd – S)/VF], where kF (VF) is the wave vector (Fermi velocity) of one-dimensional electrons. Estimation gives for α the value of about 10³cm⁻¹ in the subTHz frequency range.
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| ISSN: | 1560-8034 |