engleski

Possibility of optical evidence for charge-transfer excitations in YBa2Cu3O7−δ

We present a three-level model that addresses the possibility that charge-transfer fluctuations are responsible for the anomalously large intensity of the 155 cm−1 Ba mode observed by Genzel et al. The model also addresses the accompanying Raman signature and the c-axis lattice constant variations with oxygen content.

high temperature superconductors ; charge-transfer excitations ; three-level model ; Raman signature

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