Phys. Rev. B 45, 5027–5030 (1992)Observation of strong electron-phonon coupling effects in YbPO4Received 29 May 1991; published in the issue dated 1 March 1992 The electronic and vibrational Raman spectra of a single crystal of YbPO4 have been investigated. The Eg phonon at 310 cm-1 is found to have an anomalously large Raman linewidth of 50 cm-1 at room temperature. Particularly striking was the observation that this transition is split into several separate transitions that move apart in energy as the temperature is lowered. The magnitude of these effects is very large. These observations are interpreted on the basis of electron-phonon coupling, and phenomenological calculations are presented and compared with the experimental data. © 1992 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.45.5027
DOI:
10.1103/PhysRevB.45.5027
PACS:
63.20.Kr, 78.30.Hv
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