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SUMMARY:PRL 100 106402 Barath et al.\n:\nQuantum and Classical Mode Soften
 ing Near the\nCharge-Density-Wave-Superconductor Transition of CuxTiSe2 - 
 Paul Nahai-Williamson
DTSTART:20080516T100000Z
DTEND:20080516T110000Z
UID:TALK12226@talks.cam.ac.uk
CONTACT:Eoin O'Farrell
DESCRIPTION:Temperature- and x-dependent Raman scattering studies of the c
 harge-density-wave (CDW) amplitude modes in CuxTiSe2 show that the amplitu
 de mode frequency omega0 exhibits identical power-law scaling with the red
 uced temperature T/TCDW and the reduced Cu content x/xc\, i.e.\, omega0~(1
 -p)0.15 for p=T/TCDW or x/xc\, suggesting that mode softening is independe
 nt of the control parameter used to approach the CDW transition. We provid
 e evidence that x-dependent mode softening in CuxTiSe2 is associated with 
 the reduction of the electron-phonon coupling constant\, and that x-depend
 ent “quantum“ (T~0) mode softening suggests the presence of a quantum 
 critical point within the superconductor phase of CuxTiSe2.
LOCATION:tba
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