2015/12/13 by Jie Xing, Hai Lin, Yu-Feng Li +6 · 2 citations
Business, Management and Accounting · Chemistry · Materials Science · Medicine · Physics and Astronomy · #Chemistry #Condensed matter physics #Corporate Taxation and Avoidance #Crystal structure #Crystallography #Iron-based superconductors research #Materials science #Medicine #NODAL #Physics #Physics of Superconductivity and Magnetism #Superconductivity #Tetragonal crystal system #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.93.104520
published as Phys. Rev. B 93, 104520 (2016) · 6 pages, 5 figures
arxiv created 2015/12/13 · openalex publication_date 2016/03/17 · arxiv updated 2016/03/23 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Low-temperature specific heat has been measured in FeS superconductor with the transition temperature of 4.55 K. It is found that the low-temperature electronic specific heat Ce/T can be fitted to a linear relation in the low-temperature region, but fails to be described by an exponential relation as expected by an s-wave gap. We try fittings to the data with different gap structures and find that a model with one or two nodal gaps can fit the data. Under a magnetic field, the field induced specific heat coefficient \mathrm\ensuremathΔ\ensuremathγe=[Ce(H)\ensuremath-Ce(0)]/T shows the Volovik relation \mathrm\ensuremathΔ\ensuremathγe(H)\ensuremath∝√(H), suggesting the presence of nodal gap(s) in this material.