Anisotropic fully gapped superconductivity in quasi-one-dimensional Li0.9Mo6O17
M. J. Grant, T. M. Huijbregts, R. Nicholls, M. Greenblatt, P. Chudzinski, A. Carrington, N. E. Hussey
DOI 10.1103/y4fj-8c2m · Physical Review B
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Abstract
Superconductivity in quasi-one-dimensional Li0.9Mo6O17 emerges from an exotic, nonmetallic normal state that exhibits signatures of Tomonaga-Luttinger liquid behavior, emergent symmetry, and excitonic order. The high upper critical field, Hc2, in Li0.9Mo6O17 suggests that that the favored pairing state is spin-triplet in nature. Here, we report measurements of the magnetic penetration depth down to 0.08K (T/Tc≲0.04) and the specific heat down to 0.4K (T/Tc≲0.2), and show that they are consistent with a moderately coupled, fully gapped superconducting state with marked gap anisotropy and a minimum (Δmin≃0.4kBTc) occurring over a very narrow region in k space. Combined with knowledge of Hc2, these measurements support the presence of a nodeless and possibly odd-parity spin-triplet superconducting order parameter in Li0.9Mo6O17.
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. | 2.1 | Pressure not reported | unknown |
| Li0.9Mo6O17 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.28 | Pressure not reported | onset |
| Li0.9Mo6O17 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.05 | Pressure not reported | onset |
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