Nodeless Versus Nodal Scenarios of Possible Triplet Superconductivity in the Quasi-One-Dimensional Layered Conductor Li${}_{0.9}$Mo${}_6$O${}_{17}$

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, $H_p$, provided that superconducting pairing of electrons are of a triplet nature. We demonstrate that the superconducting state of the quasi-one-dimensional layered conductor, $\mathrm{L}{\mathrm{i}}_{0.9}\mathrm{M}{\mathrm{o}}_6{\mathrm{O}}_{17}$, 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, $H_{c_2}^x$, five times higher than $H_p$. With recent experimental measurements on the $\mathrm{L}{\mathrm{i}}_{0.9}\mathrm{M}{\mathrm{o}}_6{\mathrm{O}}_{17}$ favoring the nodeless order parameter, we present a strong argument supporting triplet pairing in this compound.

8 pages, 4 figures, 1 table

References in corpus (5)

• Anomalous In-Plane Anisotropy of the Onset of Superconductivity in (TMTSF)2ClO4
• New Luttinger liquid physics from photoemission on Li${}_{0.9}$Mo${}_6$O${}_{17}$
• In-plane magnetic field anisotropy of the FFLO state in layered superconductors
• Hidden Reentrant and Larkin-Ovchinnikov-Fulde-Ferrell Superconducting Phases in a Magnetic Field in (TMTSF)${}_2$ClO${}_4$
• D-wave-like nodal superconductivity in the organic conductor (TMTSF)2ClO4

Cited by in corpus (5)

• Spin-triplet superconductivity in a weak-coupling Hubbard model for the quasi-one-dimensional compound Li${}_{0.9}$Mo${}_6$O${}_{17}$
• Quantum Limit in a Magnetic Field for Triplet Superconductivity in a Quasi-One-Dimensional Conductor
• Triplet superconductivity in a model of Li${}_{0.9}$Mo${}_6$O${}_{17}$
• Possible restoration of superconductivity in the quasi-one-dimensional conductor Li${}_{0.9}$Mo${}_6$O${}_{17}$ in feasibly high pulsed magnetic fields, $H\simeq 100T$
• Wannier-Orbital theory and ARPES for the quasi-1D conductor LiMo${}_6$O${}_{17}$