Polaronic Signatures in Phonon Isotopic Shifts
Description:
The effect of O(16) by O(18) isotopic substitution in the excitation spectrum of a model electron-phonon Hamiltonian, previously used to describe the dynamics of the O(4)-Cu(1)-O(4) cluster in YBa{sub 2}Cu{sub 3}O{sub 7}, is presented. This model includes electronic correlations and electron-phonon interactions, exhibiting the presence of polaron tunneling. The calculated isotopic shifts of phonon excitations differ from those found using harmonic or anharmonic potentials, and are consistent re…
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Date:
June 1, 1998
Creator:
de Leon, J. Mustre; de Coss, R.; Rubio-Ponce, A.; Bishop, A. R. & Trugman, S. A.
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