Superconductor to spin-density-wave transition in quasi-one-dimensional metals with repulsive anisotropic interaction

A. V. Rozhkov

Research output: Contribution to journalArticlepeer-review

Abstract

A mechanism for superconductivity in a quasi-one-dimensional system with repulsive Ising-anisotropic interaction is studied. The Ising anisotropy opens the gap Δs in the spin sector of the model. This gap allows the triplet superconductivity and the spin-density wave as the only broken symmetry phases. These phases are separated by the first order transition. The transport properties of the system are investigated in different parts of the phase diagram. The calculation of DC conductivity σ(T) in the high-temperature phase shows that the function σ(T) cannot be used as an indicator of a superconducting ground state: even if σ(T) is a decreasing function at high temperature, yet, the ground state may be insulating spin-density wave; the opposite is also true. The calculation of the spin dynamical structure factor Szz(q, ω) demonstrates that it is affected by the superconducting phase transition in a qualitative fashion: below Tc the structure factor develops a gap with a coherent excitation inside this gap.

Original languageEnglish
Pages (from-to)1149-1150
Number of pages2
JournalPhysica C: Superconductivity and its Applications
Volume460-462 II
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - 1 Sep 2007
Externally publishedYes

Keywords

  • Non-BCS
  • Quasi-one-dimensional
  • Superconductivity

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