Multiorbital analysis of the effects of uniaxial and hydrostatic pressure on Tc in the single-layered cuprate superconductors

• Sakakibara, Hirofumi

• Suzuki, Katsuhiro

• Usui, Hidetomo

• Kuroki, Kazuhiko

• Arita, Ryotaro

• Scalapino, Douglas J.

• Aoki, Hideo

Abstract

The origin of uniaxial and hydrostatic pressure effects on Tc in the single-layered cuprate superconductors is theoretically explored. A two-orbital model, derived from first principles and analyzed with the fluctuation exchange approximation gives axial-dependent pressure coefficients ∂Tc/∂Pa>0, ∂Tc/∂Pc<0, with a hydrostatic response ∂Tc/∂P>0 for both La214 and Hg1201 cuprates, in qualitative agreement with experiments. Physically, this is shown to come from a unified picture in which higher Tc is achieved with an “orbital distillation,” namely, the less the dx2-y2 main band is hybridized with the dz2 and 4s orbitals the higher the Tc. Some implications for obtaining higher Tc materials are discussed.

Journal

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

  Physical review. Third series. B, Condensed matter and materials physics 86 134520-, 2012-10-17

  American Physical Society

Details

• CRID: 1050296829527000320
• NII Article ID: 120006724709
• NII Book ID: AA11187113
• ISSN: 24699950
• Web Site: https://repository.lib.tottori-u.ac.jp/records/7327
• Text Lang: en
• Article Type: journal article
• Data Source:
  • IRDB
  • CiNii Articles