TY - JOUR
T1 - A Raman study of the organic superconductor κ-(BEDT-TTF)2Cu(SCN)2 at high pressure
AU - McDonald, R. D.
AU - Klehe, A. K.
AU - Jephcoat, A. P.
AU - Olijnyk, H.
AU - Sasaki, T.
AU - Hayes, W.
AU - Singleton, J.
PY - 2001/4/16
Y1 - 2001/4/16
N2 - The Raman spectrum of the organic superconductor κ-(BEDT-TTF)2Cu(SCN)2 has been measured under hydrostatic pressures up to 1.5 GPa at room temperature. Linear variation of all the observed modes with pressure confirms the absence of a structural phase transition in this pressure range. The Raman spectra reveal three low-frequency features that rapidly stiffen with pressure, d ln v/dP = 5-17% GPa-1; comparison with x-ray data indicates assignment to lattice modes. By contrast, most Raman-active intramolecular vibrations stiffen by only 0.1-1% GPa-1. Contrary to expectations from a previous high-pressure x-ray study, we do not observe a pressure induced splitting of the 3Ag mode.
AB - The Raman spectrum of the organic superconductor κ-(BEDT-TTF)2Cu(SCN)2 has been measured under hydrostatic pressures up to 1.5 GPa at room temperature. Linear variation of all the observed modes with pressure confirms the absence of a structural phase transition in this pressure range. The Raman spectra reveal three low-frequency features that rapidly stiffen with pressure, d ln v/dP = 5-17% GPa-1; comparison with x-ray data indicates assignment to lattice modes. By contrast, most Raman-active intramolecular vibrations stiffen by only 0.1-1% GPa-1. Contrary to expectations from a previous high-pressure x-ray study, we do not observe a pressure induced splitting of the 3Ag mode.
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U2 - 10.1088/0953-8984/13/15/101
DO - 10.1088/0953-8984/13/15/101
M3 - Letter
AN - SCOPUS:0035896772
VL - 13
SP - L291-L298
JO - Journal of Physics Condensed Matter
JF - Journal of Physics Condensed Matter
SN - 0953-8984
IS - 15
ER -