Gap Structure of the Spin-Triplet SuperconductorSr2RuO4Determined from the Field-Orientation Dependence of the Specific Heat

2003/11/30 by Kazuhiko Deguchi, K. Deguchi, Zhiqiang Mao +4 · 1 citation
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevlett.92.047002

published as Phys. Rev. Lett. 92, 047002 (2004) · 4 pages, 4 figures

openalex publication_date 2004/01/29 · arxiv created 2004/01/30 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We report the field-orientation dependent specific heat of the spin-triplet superconductor Sr2RuO4 under the magnetic field aligned parallel to the RuO2 planes with high accuracy. Below about 0.3 K, striking fourfold oscillations of the density of states reflecting the superconducting gap structure have been resolved for the first time. We also obtained strong evidence of multiband superconductivity and concluded that the superconducting gap in the active band, responsible for the superconducting instability, is modulated with a minimum along the [100] direction.

Citations

• Orbital fluctuation-induced triplet superconductivity: Mechanism of superconductivity inSr2RuO4
• Interband Proximity Effect and Nodes of Superconducting Gap inSr2RuO4
• Identifying the pairing symmetry in theSr2RuO4superconductor
• Interlayer coupling andp-wave pairing in strontium ruthenate
• Crib-shaped triplet-pairing gap function for an orthogonal pair of quasi-one-dimensional Fermi surfaces inSr2RuO4
• Superconductivity inSr2RuO4mediated by Coulomb scattering

Cited by

• Angular dependence of the upper critical field ofSr2RuO4