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Evidence of nodal gap structure in the basal plane of the FeSe superconductor
- Source :
- Phys. Rev. B 98, 180501(R) (2018)
- Publication Year :
- 2018
-
Abstract
- Identifying the symmetry of the wave function describing the Cooper pairs is pivotal in understanding the origin of high-temperature superconductivity in iron-based superconductors. Despite nearly a decade of intense investigation, the answer to this question remains elusive. Here we use the muon spin rotation/relaxation (muSR) technique to investigate the underlying symmetry of the pairing state of the FeSe superconductor, the basic building block of all iron-chalcogenide superconductors. Contrary to earlier muSR studies on powders and crystals, we show that while the superconducting gap is most probably anisotropic but nodeless along the crystallographic c-axis, it is nodal in the ab-plane, as indicated by the linear increase of the superfluid density at low temperature. We further show that the superconducting properties of FeSe display a less pronounced anisotropy than expected.<br />Comment: 13 Pages, 8 figures (Accepted in PRB Rapid)
- Subjects :
- Condensed Matter - Superconductivity
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. B 98, 180501(R) (2018)
- Publication Type :
- Report
- Accession number :
- edsarx.1810.06269
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevB.98.180501