Tunneling spectroscopy on an electron-doped Pr1-xLaCe xCuO4 with x 0.11

N. Miyakawa, M. Minematsu, K. Ogata, M. Fujita, K. Yamada

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2 Citations (Scopus)


We present point contact tunneling conductances measured on single crystals of an electron-doped cuprate, Pr0.89LaCe0.11CuO 4 (PLCCO) with Tc∼26K, which is nearly optimally-doped regime. The tunneling conductances on PLCCO measured at 4.2K exhibit reproducible superconducting gap peaks at ∼6.09 0.47mV on the V-shaped background conductance, where the subgap-shape is cusplike, and the model with the nonmonotonic d-wave energy gap is in good agreement with the experimental tunneling conductance for PLCCO. Furthermore we observed a fine structure beyond the gap peak, which would reflect a bosonic mode for pairing, such like phonon for conventional superconductors.

Original languageEnglish
Article number052163
JournalJournal of Physics: Conference Series
Issue number5
Publication statusPublished - 2009


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