Physics – Condensed Matter – Superconductivity
Scientific paper
2001-03-19
Physics
Condensed Matter
Superconductivity
5 pages, 2 figures
Scientific paper
10.1103/PhysRevB.64.214510
Quasiparticle states near the surface of a quasi-one-dimensional organic superconductor $({TMTSF})_{2}{PF}_6$ are studied based on an extended Hubbard model on a quasi-one dimensional lattice at quarter-filling. Three types of pairing symmetries, (i) p-wave, (ii) d-wave, or (iii) $f$-wave are assumed. The resulting surface density of states has characteristic features for each pairing symmetry: i) a zero-energy peak (ZEP) in a U-shaped structure, ii) a V-shaped structure without ZEP, and iii) a ZEP in a V-shaped structure. From these results, we propose that the tunneling spectroscopy serves as a strong method to identify the the pairing symmetry in $({TMTSF})_{2}{PF}_6$.
Kashiwaya Satoshi
Kuroki Kazuhiko
Tanaka Yasuhiro
Tanuma Yasunari
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