title: Tunneling into the normal state of Pr2-xCexCuO4.
abstract: The temperature dependence of the tunneling conductance was measured for various doping levels of Pr(2-x)CexCuO4 using planar junctions. A normal state gap is seen at all doping levels studied, x=0.11 to x=0.19. We find it to vanish above a certain temperature T*. T* is greater than T(c) for the underdoped region and it follows T(c) on the overdoped side. This behavior suggests finite pairing amplitude above T(c) on the underdoped side.
authors.affiliation: Center for Superconductivity Research, Department of Physics, University of Maryland, College Park, MD 20742, USA.
authors.forename: Y
authors.initials: Y
authors.lastname: Dagan
authors.forename: M M
authors.initials: MM
authors.lastname: Qazilbash
authors.forename: R L
authors.initials: RL
authors.lastname: Greene