Hidden Reentrant and Larkin-Ovchinnikov-Fulde-Ferrell Superconducting Phases in a Magnetic Field in (TMTSF)${}_2$ClO${}_4$

Abstract

We solve a long-standing problem about a theoretical description of the upper critical magnetic field, parallel to conducting layers and perpendicular to conducting chains, in (TMTSF)${}_2$ClO${}_4$ superconductor. In particular, we explain why the experimental upper critical field, $H_{c2}^{b^{\prime }}\simeq 6T$, is higher than both the quasi-classical upper critical field and Clogston paramagnetic limit. We show that this property is due to the coexistence of the hidden Reentrant and Larkin-Ovchinnikov-Fulde-Ferrell phases in a magnetic field in a form of three plane waves with non-zero momenta of the Cooper pairs. Our results are in good qualitative and quantitative agreement with the recent experimental measurements of $H_{c2}^{b^{\prime }}$ and support a singlet d-wave like scenario of superconductivity in (TMTSF)${}_2$ClO${}_4$.

4 pages, no figures

References in corpus (2)

• Anomalous In-Plane Anisotropy of the Onset of Superconductivity in (TMTSF)2ClO4
• Link between antiferromagnetism and superconductivity probed by nuclear spin relaxation in organic conductors

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