Analysis of the pseudogap-related structure in tunneling spectra of superconducting Bi2Sr2CaCu2O8+δ revealed by the break-junction technique
T. Ekino, A. M. Gabovich, Mai Suan Li, M. Pȩkała, H. Szymczak, A. I. Voitenko
DOI 10.1103/PhysRevB.76.180503 · Physical Review B
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Abstract
The tunnel conductance G(V) for break junctions made of single-crystal as-grown Bi2Sr2CaCu2O8+δ samples with Tc≈86–89K were measured and clear-cut dip-hump structures (DHSs) were found in the range 80–120mV of the bias voltage V. A theory of tunneling in symmetrical junctions between inhomogeneous charge-density-wave (CDW) superconductors, considered in the framework of the s-pairing model, has been developed. CDWs have been shown to be responsible for the appearance of the DHS in the tunnel current-voltage characteristics and properly describe the experimental results.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 87.5 | Pressure not reported | unknown |
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