Nodeless versus nodal scenarios of possible triplet superconductivity in the quasi-one-dimensional layered conductor Li0.9Mo6O17
O. Sepper, A. G. Lebed
DOI 10.1103/PhysRevB.88.094520 · Physical Review B
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Abstract
We consider the problem of the orbital upper critical magnetic field, parallel to the most conducting axis of a quasi-one-dimensional layered superconductor. It is shown that superconductivity can be destroyed through orbital effects at fields much higher than the so-called Clogston-Chandrasekhar paramagnetic limiting field Hp, provided that superconducting pairing of electrons are of a triplet nature. We demonstrate that the superconducting state of the quasi-one-dimensional layered conductor Li0.9Mo6O17 is well described by the suggested theory. To this end, we consider two competing scenarios: (1) a superconducting order parameter without zeros on the Fermi surface, and (2) one with zeros on the Fermi surface—both are shown to lead to destruction of superconductivity at a magnetic field Hc2x, five times higher than Hp. With recent experimental measurements on the Li0.9Mo6O17 favoring the nodeless order parameter, we present a strong argument supporting triplet pairing in this compound.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Li0.9Mo6O17 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.2 | Pressure not reported | unknown |
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