Graphite-superconductor junctions as a probe of order-parameter symmetry
David Parker, Peter Thalmeier
DOI 10.1103/PhysRevB.76.064525 · Physical Review B
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Abstract
We discuss a method for determining the order-parameter symmetry of quasi-one- and quasi-two-dimensional unconventional superconductors by the use of graphite-superconductor junctions. The use of a graphite gate voltage, in combination with a bias tunneling voltage, allows access to more information concerning gap values on the Fermi surface than with conventional tunneling spectroscopy, where only a bias voltage is employed. In particular, the use of a gate voltage allows one to tune the momentum-space size of the tunneling region, thus accessing gap values over local regions of the superconductor Fermi surface, in contrast to conventional tunneling techniques.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| CeCoIn5 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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