Point contact spectroscopy of the electron-doped cuprate superconductor Pr{2-x}Ce{x}CuO4: The dependence of conductance-voltage spectra on cerium doping, barrier strength and magnetic field

Abstract

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.

arXiv comment13 pages, 9 figures

References in corpus (23)

• Tunneling into Current-Carrying Surface States of High T${}_c$ Superconductors
• Phase-sensitive Evidence for d-wave Pairing Symmetry in Electron-doped Cuprate Superconductors
• Anomalous electronic structure and pseudogap effects in Nd_1.85Ce_0.15CuO_4
• Breakdown of Fermi-liquid theory in a cuprate superconductor
• Evidence of a d to s-wave pairing symmetry transition in the electron-doped cuprate superconductor Pr${}_{2-x}$Ce${}_x$CuO${}_4$
• Quantum phase transitions in d-wave superconductors
• Superconducting Gap Anisotropy in Nd${}_{1.85}$Ce${}_{0.15}$CuO${}_4$: Results from Photoemission
• Nonmonotonic d_{x^2-y^2} Superconducting Order Parameter in Nd_{2-x}Ce_xCuO_4
• Evidence for nodal quasiparticles in electron-doped cuprates from penetration depth measurements
• Evidence for a Transition in the Pairing Symmetry of the Electron-Doped Cuprates La_{2-x}Ce_xCuO_{4-y} and Pr_{2-x}Ce_xCuO_{4-y}
• Microwave Electrodynamics of Electron-Doped Cuprate Superconductors
• Anomalous Low Temperature Behavior of Superconducting Nd(1.85)Ce(0.15)CuO(4-y)
• Andreev Bound States in High Temperature Superconductors
• Tunneling conductance of normal metal / $d_{x^2-y^2}$-wave superconductor junctions in the presence of broken time reversal symmetry states near interfaces
• Local and macroscopic tunneling spectroscopy of Y(1-x)CaxBa2Cu3O(7-d) films: evidence for a doping dependent is or idxy component in the order parameter
• Andreev reflections on Y1-xCaxBa2Cu3O7-delta evidence for an unusual proximity effect
• Gapped tunneling spectra in the normal state of Pr${}_{2-x}$Ce${}_x$CuO${}_4$
• Andreev Bound States, Surfaces and Subdominant Pairing in High Tc Superconductors
• Evidence for pseudogap and phase-coherence gap separation by Andreev reflection experiments in Au/La_{2-x}Sr_{x}CuO_4 point-contact junctions
• Andreev reflections and tunneling spectroscopy on underdoped NCCO (x = 0.15)
• Tunneling conductance in normal metal - high $T_C$ cuprate junctions in the presence of magnetic field
• Magnetic Field Dependence of Electronic Specific Heat in Pr_{1.85} Ce_{0.15} CuO_4
• Andreev reflection at point contacts with heavy-fermion UBe13 ?

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• Evidence of a s-Wave Pairing in Heavily Zn-doped $YB{a}_{2}C{u}_3{O}_{7-\delta }$ from Andreev Reflection Spectra
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