Tunneling in a spin-density-wave superconductor
L. L. Daemen, A. W. Overhauser
DOI 10.1103/PhysRevB.40.129 · Physical Review B
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Abstract
The differential tunneling conductance of normal-insulator-superconductor (NIS) and superconductor-insulator-superconductor (SIS) junctions is calculated for polycrystalline superconducting films which have either a spiral or linear spin-density-wave (SDW). In the NIS case, the SDW induced-gap anisotropy causes an enhancement of the low-bias tunneling conductance by several orders of magnitude, compared to that predicted by (isotropic) Bardeen-Cooper-Schrieffer theory. In the SIS case, the tunneling conductance is also enhanced, though the effect is less spectacular. The calculations are compared with existing experimental data on Al-Pb junctions. Fairly good agreement is found, which supports the speculation that Pb might have a SDW ground state.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Pb 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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