Anisotropic zero-resistance onset in organic superconductors

Vladislav D. Kochev; Kaushal K. Kesharpu; Pavel D. Grigoriev

doi:10.1103/PhysRevB.103.014519

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Anisotropic zero-resistance onset in organic superconductors

Vladislav D. Kochev, Kaushal K. Kesharpu, Pavel D. Grigoriev

DOI 10.1103/PhysRevB.103.014519 · Physical Review B

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Abstract

We study the coexistence of superconductivity (SC) and density-wave state and reconcile various puzzling experimental data in organic superconductors (TMTSF)2PF6 and (TMTSF)2ClO4. The anisotropic resistance drop above Tc is qualitatively described by nascent isolated SC islands within a bulk analytical model. However, the observed anisotropic SC onset is explained only when the finite size and flat needle shape of samples is considered. Our results pave a way to estimate the volume fraction and the typical size of SC islands far from the sample surface and apply to many inhomogeneous superconductors, including high-Tc cuprate or Fe-based ones.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
(TMTSF)2PF6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1.1	0.95 GPa	unknown
(TMTSF)2ClO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown