Quasiparticle current along the c axis in junctions involving d-wave superconductors partially gapped by charge density waves

Alexander M. Gabovich; Mai Suan Li; Henryk Szymczak; Alexander I. Voitenko

doi:10.1103/PhysRevB.92.054512

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Quasiparticle current along the c axis in junctions involving d-wave superconductors partially gapped by charge density waves

Alexander M. Gabovich, Mai Suan Li, Henryk Szymczak, Alexander I. Voitenko

DOI 10.1103/PhysRevB.92.054512 · Physical Review B

T1

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Abstract

Quasiparticle tunnel current either between identical d-wave superconductors partially gapped by charge density waves (SCDWs) or between an SCDW and a normal metal was calculated. The cases of unidirectional and checkerboard CDWs were considered. The tunnel conductance was found in both cases to possess a number of peculiarities, which cannot be described by introducing a single combined gap. The results are in qualitative agreement with experimental data obtained for a number of cuprates by the scanning tunnel spectroscopy, intrinsic-tunneling, and break-junction measurements. The difference between the experiment and the theory seems to stem from the spread of gap values occurring due to the intrinsic spatial inhomogeneity of nonstoichiometric oxides and reflected in the cuprate tunnel spectra.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Nd2-xCexCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown