Role of Anion Ordering in the Coexistence of Spin-Density-Wave and Superconductivity in (TMTSF)2ClO4

Abstract

Using various transport and magnetotransport probes we study the coexistence of spin-density wave and superconductor states in (TMTSF)2ClO4 at various degrees of ClO4 anions ordering. In the two-phase complex state when both superconductivity and spin-density wave are observed in transport, we find prehistory effects, enhancement of the superconducting critical field, and strong spatial anisotropy of the superconducting state. These features are inconsistent with the conventional model of structural inhomogeneities produced by anion ordering transition. We reveal instead that superconductor and spin-density wave regions overlap on the temperature -- dimerization gap V phase diagram, where V is varied by anion ordering. The effect of anion ordering on (TMTSF)2ClO4 properties is thus analogous to that of pressure on (TMTSF)2X (X=PF6 or AsF6), thereby unifying general picture of the coexistence of superconductivity and spin-density wave in these compounds.

6 pages, 5 figures, revtex

References in corpus (7)

• High - Temperature Superconductivity in Iron Based Layered Compounds
• Suppression of superconductivity by non-magnetic disorder in the organic superconductor (TMTSF)2(ClO4)(1-x)(ReO4)x
• Nodal Superconducting Order Parameter and Thermodynamic Phase Diagram of (TMTSF)2ClO4
• Properties of superconductivity on the density wave background with small ungapped Fermi surface pockets
• Coexistence of Triplet Superconductivity and Spin Density Wave
• Superconductivity on the density wave background with soliton-wall structure
• Inhomogeneous superconductivity in organic conductors: role of disorder and magnetic field

Cited by in corpus (7)

• Coexistence of Superconductor and Spin-Density Wave in (TMTSF)2ClO4: Spatial Structure of the Two-phase State
• Anisotropic zero-resistance onset in organic superconductors
• Evolution of shape and volume fraction of superconducting domains with temperature and anion disorder in (TMTSF)${}_2$ClO${}_4$
• On the size of superconducting islands on the density-wave background in organic metals
• Inhomogeneous superconductivity onset in FeSe studied by transport properties
• First-order phase transition between superconductivity and charge/spin-density wave as the reason of their coexistence in organic metals
• Influence of carrier lifetime on quantum criticality and superconducting Tc of (TMTSF)_2ClO_4