Theory of point contact spectroscopy in electron-doped cuprates

Abstract

In the hole-doped $d_{x^2-y^2}$-wave cuprate superconductor, due to the midgap surface state (MSS), a zero bias conductance peak (ZBCP) is widely observed in [110] interface point contact spectroscopy (PCS). However, ZBCP of this geometry is rarely observed in the electron-doped cuprates, even though their pairing symmetry is still likely the $d_{x^2-y^2}$-wave. We argue that this is due to the coexistence of antiferromagnetic (AF) and the superconducting (SC) orders. Generalizing the Blonder-Tinkham-Klapwijk (BTK) formula to include an AF coupling, it is shown explicitly that the MSS is destroyed by the AF order. The calculated PCS is in good agreement with the experiments.

arXiv comment5 pages, 2 figures. Replaced with published version

References in corpus (20)

• Doping dependence of an n-type cuprate superconductor investigated by ARPES
• Andreev - Saint James reflections: a probe of cuprate superconductors
• Competition between Antiferromagnetism and Superconductivity in High $T_c$ Cuprates
• Anomalous electronic structure and pseudogap effects in Nd_1.85Ce_0.15CuO_4
• Evidence of a d to s-wave pairing symmetry transition in the electron-doped cuprate superconductor Pr${}_{2-x}$Ce${}_x$CuO${}_4$
• Direct Observation of Non-Monotonic dx2-y2-Wave Superconducting Gap in Electron-Doped High-Tc Superconductor Pr0.89LaCe0.11CuO4
• Nonmonotonic d_{x^2-y^2} Superconducting Order Parameter in Nd_{2-x}Ce_xCuO_4
• Commensurate spin dynamics in the superconducting state of an electron-doped cuprate superconductor
• Angle-Resolved Photoemission Spectroscopy of the Antiferromagnetic Superconductor Nd1.87Ce0.13CuO4: Anisotropic Spin-Correlation Gap, Pseudogap, and the Induced Quasiparticle Mass Enhancement
• Theory of tunneling conductance for normal metal/insulator/triplet superconductor junctions
• Magnetic Penetration Depth Measurements of Pr${}_{2-x}$Ce${}_x$CuO${}_{4-\delta }$ Films on Buffered Substrates: Evidence for a Nodeless Gap
• Evolution of Superconductivity in Electron-Doped Cuprates: Magneto-Raman Spectroscopy
• Superfluid response in electron-doped cuprate superconductors
• Phase-sensitive order parameter symmetry test experiments utilizing Nd2-xCexCuO4-y/Nb zigzag junctions
• Distinct Pairing Symmetries in $N{d}_{1.85}C{e}_{0.15}Cu{O}_{4-y}$ and $L{a}_{1.89}S{r}_{0.11}Cu{O}_4$ Single Crystals: Evidence from Comparative Tunnelling Measurements
• 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
• Nonmonotonic gap in the coexisting antiferromagnetic and superconducting state for electron-doped cuprate superconductors
• Andreev reflections and tunneling spectroscopy on underdoped NCCO (x = 0.15)
• Theory of Raman scattering on electron-doped high-$T_c$ superconductor
• An Alternative Interpretation of the Magnetic Penetration Depth Data on Pr(2-x)Ce(x)CuO(4-y) and La(2-x)Ce(x)CuO(4-y)

Cited by in corpus (3)

• Progress and perspectives on the electron-doped cuprates
• Point contact Andreev reflection spectroscopy of NdFeAsO_0.85
• Interplay between antiferromagnetic order and spin polarization in ferromagnetic metal/electron-doped cuprate superconductor junctions