Charge redistribution in YBa2Cu3O7-d probed by Raman spectroscopy: CuO2-plane phonon as a probe of carrier dynamics in the CuO2 plane

Minoru Osada, Masato Kakihana, Mikael Käll, Lars Börjesson

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Abstract

Yttrium barium copper oxide system, which undergoes a metal-to-insulator transition under variation of carrier concentration, was investigated using Raman spectroscopy. The intensity of CuO2-plane phonon modes decreased as the system approached the metal-to-insulator phase boundary and it scaled with the inverse of the hole concentration within the CuO2 conducting planes. The CuO2-plane mode intensity and transition temperature for the oxides was found to be correlated. It was found that a simple and useful probe for metal-to-insulator transition and carrier dynamics in the CuO2 plane for substituted materials was provided by this correlation and the CuO2-plane mode intensity.

Original languageEnglish
Pages (from-to)4988-4990
Number of pages3
JournalApplied Physics Letters
Volume81
Issue number26
DOIs
Publication statusPublished - 2002 Dec 23
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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