Orbital mixture effect on the Fermi-surface-Tc correlation in the cuprate superconductors: Bilayer vs. single layer

• Sakakibara, Hirofumi

• Suzuki, Katsuhiro

• Usui, Hidetomo

• Miyao, Satoaki

• Maruyama, Isao

• Kusakabe, Koichi

• Arita, Ryotaro

• Aoki, Hideo

• Kuroki, Kazuhiko

Abstract

By constructing dx2-y2-dz2 two-orbital models from first principles, we have obtained a systematic correlation between the Fermi surface warping and theoretically evaluated Tc for various bilayer as well as single-layer cuprates. This reveals that a smaller mixture of the dz2 orbital component on the Fermi surface leads simultaneously to larger Fermi-surface warping and higher Tc. The theoretical correlation strikingly resembles a systematic plot for the experimentally observed Tc against the Fermi surface warping due to Pavarini et al. [Phys. Rev. Lett. 87, 047003 (2001)], and the present result unambiguously indicates that the dz2 mixture is one key factor that determines Tc in the cuprates.

Journal

• Physical review. Third series. B, Condensed matter and materials physics

  Physical review. Third series. B, Condensed matter and materials physics 89 224505-, 2014-06-09

  American Physical Society

Details

• CRID: 1050015354550171904
• NII Article ID: 120006724713
• NII Book ID: AA11187113
• ISSN: 24699950
• Web Site: https://repository.lib.tottori-u.ac.jp/records/7329
• Text Lang: en
• Article Type: journal article
• Data Source:
  • IRDB
  • CiNii Articles