Physics – Condensed Matter – Superconductivity
Scientific paper
2003-03-19
Physics
Condensed Matter
Superconductivity
13 pages, 9 figures
Scientific paper
10.1103/PhysRevB.68.024502
We present conductance-voltage (G-V) data for point contact junctions between a normal metal and the electron doped cuprate superconductor Pr{2-x}Ce{x}CuO4 (PCCO). We observe a zero bias conductance peak (ZBCP) for the under-doped composition of this cuprate (x=0.13) which is consistent with d-wave pairing symmetry. For optimally-doped (x=0.15) and over-doped (x=0.17) PCCO, we find that the G-V characteristics indicate the presence of an order parameter without nodes. We investigate this further by obtaining point contact spectroscopy data for different barrier strengths and as a function of magnetic field.
Biswas Amlan
Dagan Yoram
Greene Richard L.
Ott R. A.
Qazilbash M. M.
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