Supercurrent in Nodal Superconductors

TL;DR

This paper theoretically investigates how supercurrents affect the quasiparticle density of states and critical current in nodal superconductors like d-wave and 2D f-wave types, providing insights relevant for experimental studies.

Contribution

It offers a theoretical analysis of supercurrent effects on quasiparticle states and critical current in specific nodal superconductors, focusing on d-wave and 2D f-wave types.

Findings

Computed quasiparticle density of states under supercurrent.

Analyzed temperature dependence of depairing critical current.

Results are accessible for experimental verification.

Abstract

In recent years, a number of nodal superconductors have been identified; d-wave superconductors in high T_c cuprates, CeCoIn$_5$, and \kappa-(ET)_2Cu(NCS)_2, 2D f-wave superconductor in Sr_2RuO_4 and hybrid s+g-wave superconductor in YNi_2B_2C. In this work we conduct a theoretical study of nodal superconductors in the presence of supercurrent. For simplicity, we limit ourselves to d-wave and 2D f-wave superconductors. We compute the quasiparticle density of states and the temperature dependence of the depairing critical current in nodal superconductors, both of which are accessible experimentally.