Tunneling into the normal state of Pr(2-x)CexCuO4

Details Tunneling into the normal state of Pr(2-x)CexCuO4 Tunneling into the normal state of Pr(2-x)CexCuO4

2004-12-13

arxiv.org/abs/cond-mat/0412328v1

Phys. Rev. Lett. 94, 187003 (2005)

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1103/PhysRevLett.94.187003

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 Tc for the underdoped region and it follows Tc on the overdoped side. This behavior suggests finite pairing amplitude above Tc on the underdoped side.

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