T. Honma et al., Superconductivity and charge redistribution under high pressure in the underdoped La1.916Sr0.084CuO4, PHYSICA C, 341, 2000, pp. 1933-1934
Unusual pressure-induced broadening of superconducting transition was obser
ved in La1.916Sr0.084CuO4 without excess oxygen by ac resistance measuremen
t (acR) and mutual inductance measurement (acM). Above similar to 9kbar, a
negative dT(c)/dP determined by acM and a positive dT(c)/dP determined by a
cR are observed, while below similar to 9 kbar, both dT(c)/dP are positive
in sign and identical in magnitude. This suggests the occurrence of the int
ralayer charge redistribution induced by pressure.