Racu AM, Schoenes J. Strong correlations in YH(3-delta) evidenced by Raman spectroscopy.
PHYSICAL REVIEW LETTERS 2006;
96:017401. [PMID:
16486512 DOI:
10.1103/physrevlett.96.017401]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2005] [Indexed: 05/06/2023]
Abstract
Temperature dependent Raman measurements on insulating YH(3-delta) thin films are reported. With increasing temperature we observe a huge broadening of a line corresponding to an yttrium mode. This particular mode is assigned to a breathing vibration of the yttrium atoms around an octahedral hydrogen position. The line broadening is discussed in terms of a coupling between this breathing mode and the electron excited from an octahedral H vacancy into the 4d conduction band of Y, corroborating the strong correlation models for the electronic structure of YH3.
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