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Interaction Hamiltonian Between an Electron and Interface Optical Phonons in a Four-Layer Heterostructure
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| SHI Junjie*;PAN Shaohua |
| *Department of Physics, Henan Normal University, Xinxiang 453002
China Center of Advanced Science and Technology (World Laboratory), P. O. Box 8730, Beijing 100080, and Institute of Physics, Academia Sinica, Beijing 100080
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| Cite this article: |
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SHI Junjie, PAN Shaohua 1994 Chin. Phys. Lett. 11 439-442 |
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Abstract The interaction Fröhlich-like Hamiltonian between an electron and interface optical phonons in a four-layer heterostructure (FLHS) is obtained by means of the orthonormal eigenmodes of interface optical phonons given recently. The electron-phonon coupling functions and their plots for a FLHS and its special cases, an asymmetric trilayer heterostructure (asymmetric single quantum well) and a step quantum well, are given and discussed. We find that the three branches of higher-frequencies are more important for the electron-phonon interaction than the other three in the six branches of interface modes in a FLHS. Moreover, we also find that the situation in an asymmetric trilayer heterostructure is similar to that of a FLHS.
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| Keywords:
63.20.Kr
71.38.+i
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Published: 01 July 1994
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