Quantum Limit in a Magnetic Field for Triplet Superconductivity in a Quasi-One-Dimensional Conductor

TL;DR

This paper theoretically investigates the upper critical magnetic field in a triplet quasi-one-dimensional superconductor, revealing that superconductivity can be restored at high magnetic fields due to reversible orbital effects, with potential experimental realization.

Contribution

It demonstrates the possibility of reaching the quantum limit in a triplet superconductor at laboratory magnetic fields, showing superconductivity can re-emerge at high fields.

Findings

Superconductivity can be restored at high magnetic fields due to reversible orbital effects.

The quantum limit can be achieved in Li$_{0.9}$Mo$_6$O$_{17}$ at 500-700 T.

Superconductivity suppression and restoration depend on magnetic field orientation and strength.

Abstract

We theoretically consider the upper critical magnetic field, perpendicular to a conducting axis in a triplet quasi-one-dimensional superconductor. In particular, we demonstrate that, at high magnetic fields, the orbital effects against superconductivity in a magnetic field are reversible and, therefore, superconductivity can restore. It is important that the above mentioned quantum limit can be achieved in presumably triplet quasi-one-dimensional superconductor Li$_{0.9}$Mo$_6$O$_{17}$ [J.-F. Mercure et al., Phys. Rev. Lett. {\bf 108}, 187003 (2012)] at laboratory available pulsed magnetic fields of the order of $H = 500-700 \ T$.