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- W2394302743 abstract "In this paper, the method that had been used by one of the authors to investigatethe effect of lattice vibration on exciton motion in a polar crystal is generalized to studythe effect of lattice vibration on exciton motion in a piezoelectric crystal. Equations forthe ground state energy, the effective mass of the mass centre, the effective reduced massand the effective electron-hole interaction potential in an exciton in piezoelectric crystalsare derived. It is shown that the self-trapped energy of an exciton depends not only onthe electron-phonon coupling parameter, the speed of sound and the Debye wave number, butalso on the electron-hole mass ratio. An exciton will be self-trapped when the electron-holemass ratio σ lies within the range 0.366σ2.73; and the effective mass of the masscentre and the effective reduced mass depend not only on the electron-phonon couplingparameter, the speed of sound and the Debye wave number, but also on the magnitude andorientation of the relative electron-hole position vector. We have to point out that in pie-zoelectric crystals the effective electron-hole interaction potential of a Wannier exciton isCoulombic, but that induced by electron-phonon interaction in a polar crystal is of screeningtype." @default.
- W2394302743 created "2016-06-24" @default.
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- W2394302743 date "1982-01-01" @default.
- W2394302743 modified "2023-09-25" @default.
- W2394302743 title "EFFECT OF LATTICE VIBRATION ON EXCITON PROPERTIES IN PIEZOELECTRIC CRYSTALS" @default.
- W2394302743 hasPublicationYear "1982" @default.
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