Coherent quasiparticle tunneling in d-wave superconductor SIS junctions
Yoshiharu Yamada, Minoru Suzuki
DOI 10.1103/PhysRevB.66.132507 · Physical Review B
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Abstract
Coherent quasiparticle tunneling characteristics are numerically calculated for a superconductor/insulator/superconductor (SIS) tunnel junction with a d-wave order parameter. It is found that in coherent tunneling the differential conductance dI/dV exhibits a very sharp peak at the superconducting gap voltage, showing a sharp contrast to the case of incoherent tunneling, where the dI/dV peak is very broad. The sharp dI/dV peak is in good agreement with experimental results for intrinsic Josephson junctions of Bi2Sr2CaCu2O8+δ. It is also found that when a small amount of incoherent tunneling is involved, the tunneling characteristics change abruptly to those of incoherent tunneling. These results imply that the tunneling in the intrinsic Josephson junctions is mostly coherent.
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. | — | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8 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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