Gapped tunneling spectra in the normal state of Pr2-xCexCuO4 - art. no. 104519

We present tunneling data in the normal state of the electron doped cuprate superconductor Pr2-xCexCuO4 for three different values of the doping x. Th e normal state is obtained by applying a magnetic field greater than the up per critical field H-c2 for T< T-c. We observe an anomalous normal state ga p near the Fermi level. From our analysis of the tunneling data we conclude that this is a feature of the normal state density of states. We discuss p ossible reasons for the formation of this gap and its implications for the nature of the charge carriers in the normal and the superconducting states of cuprate superconductors.