Pressure effect on the pseudogap in the optimally doped high-temperature superconductorP. S. Häfliger1, A. Podlesnyak1, K. Conder2 and A. Furrer1
1 Laboratory for Neutron Scattering, ETH Zurich & PSI Villigen CH-5232 Villigen PSI, Switzerland
2 Laboratory for Developments and Methods, Condensed Matter Research with Neutrons and Muons - CH-5232 Villigen PSI, Switzerland
received 2 June 2005; accepted in final form 4 October 2005
published online 2 December 2005
The effect of hydrostatic pressure on the relaxation rate of crystal-field excitations in the optimally doped high-Tc superconductor ( ) has been investigated by means of inelastic neutron scattering. The temperature T* where the pseudogap opens is found to shift downwards from (p=0) to ( ) and to ( ), i.e., .
74.62.Fj - Pressure effects.
76.30.Kg - Rare-earth ions and impurities.
78.70.Nx - Neutron inelastic scattering.
© EDP Sciences 2006