Field Induced Nodal Order Parameter in the Tunneling Spectrum of YBa${}_2$Cu${}_3$O${}_{7-x}$ Superconductor

G. Leibovitch, R. Beck, Y. Dagan +2

We report planar tunneling measurements on thin films of YBa${}_2$Cu${}_3$O${}_{7-x}$ at various doping levels under magnetic fields. By choosing a special setup configuration, we have p…