Tunneling into Current-Carrying Surface States of High- Tc Superconductors
M. Fogelström, D. Rainer, J. A. Sauls
DOI 10.1103/PhysRevLett.79.281 · Physical Review Letters
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Abstract
Theoretical results for the ab-plane tunneling conductance in the d-wave model for high- Tc superconductors are presented. The d-wave model predicts surface bound states below the maximum gap. A subdominant order parameter, stabilized by the surface, leads to a splitting of the zero-bias conductance peak (ZBCP) in zero external field and to spontaneous surface currents. In a magnetic field, screening currents shift the bound state spectrum, leading to a splitting of the ZBCP that is linear in H at low fields and saturates at a pair breaking critical field of order Hc*≃3T.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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