2011/01/31 by Yuki Nagai, Hiroki Nakamura, Masahiko Machida · 1 citation
Materials Science · Mathematics · Physics and Astronomy · #Basis (linear algebra) #Condensed matter physics #Fermi surface #Function (biology) #Geometry #Iron-based superconductors research #Magnetism in coordination complexes #Materials science #Mathematics #Organic and Molecular Conductors Research #Physics #Superconductivity #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.83.104523
published as Phys. Rev. B 83, 104523 (2011) · 8 pages, 11 figures, Accepted in Phys. Rev. B
openalex publication_date 2011/03/30 · arxiv created 2011/07/01 · arxiv updated 2015/03/17 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We calculate angle-dependent heat capacity in a low magnetic field range on the basis of the Kramer-Pesch approximation together with an electronic structure obtained by first-principles calculations to determine a superconducting gap function of (TMTSF)2ClO4 through its comparisons with experiments. The present comparative studies reveal that a nodal d-wave gap function consistently explains the experimental results for (TMTSF)2ClO4. It is especially emphasized that the observed unusual axis asymmetry of the angle dependence eliminates the possibility of s-wave and nodeless d-wave functions. It is also found that the directional ordering of ClO4 anions does not have any significant effects on the Fermi surface structure contrary to the previous modelings since the two Fermi surfaces obtained by the band calculations almost cross within the present full accuracy in first-principles calculations.