2003/03/31 by Yasuhiro Saiga, Masaki Oshikawa
Materials Science · Physics and Astronomy · #Iron-based superconductors research #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.68.094511
published as Phys. Rev. B 68, 094511 (2003) · 5 pages, 7 figures; revised version
openalex publication_date 2003/09/17 · arxiv created 2003/10/14 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The two-dimensional t\ensuremath-J model in a staggered field is studied by exact diagonalization of small clusters. For the low-hole-density region and a realistic value of J/t, it is found that the presence of a staggered field strengthens the attraction between two holes. With increasing field, the d_x2\ensuremath-y2-wave superconducting correlations are enhanced while the extended-s-wave ones hardly change. This implies that coexistence of the d_x2\ensuremath-y2-wave superconducting order and the commensurate antiferromagnetic order occurs in a staggered field.