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

2014/03/31 by Hirofumi Sakakibara, Katsuhiro Suzuki, Hidetomo Usui +6 · 4 citations
Mathematics · Physics and Astronomy · #Advanced Condensed Matter Physics #Artificial intelligence #Computer science #Condensed matter physics #Fermi surface #Geometry #Image warping #Mathematics #Physics #Physics of Superconductivity and Magnetism #Superconductivity #Superconductivity in MgB2 and Alloys #Surface (topology) #cond-mat.mtrl-sci #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.89.224505

published as Phys. Rev. B 89 224505(2014) · 7pages, 3 figures

arxiv created 2014/06/03 · openalex publication_date 2014/06/09 · arxiv updated 2014/06/10 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

By constructing d_x²\ensuremath-y²\ensuremath-d_z² two-orbital models from first principles, we have obtained a systematic correlation between the Fermi surface warping and theoretically evaluated T_c for various bilayer as well as single-layer cuprates. This reveals that a smaller mixture of the d_z² orbital component on the Fermi surface leads simultaneously to larger Fermi-surface warping and higher T_c. The theoretical correlation strikingly resembles a systematic plot for the experimentally observed T_c against the Fermi surface warping due to Pavarini et al. [Phys. Rev. Lett. 87, 047003 (2001)], and the present result unambiguously indicates that the d_z² mixture is one key factor that determines T_c in the cuprates.

Citations

• Effect of chemical inhomogeneity in bismuth-based copper oxide superconductors
• Origin of the material dependence ofTcin the single-layered cuprates
• Quasiparticle Bands in Cuprates by Quantum-Chemical Methods: Towards anAb InitioDescription of Strong Electron Correlations
• Ab initiomolecular dynamics for liquid metals
• Efficient iterative schemes forab initiototal-energy calculations using a plane-wave basis set
• Maximally localized Wannier functions for entangled energy bands
• Enhancement of Pairing Correlation byt′in the Two-Dimensional Extendedt−JModel
• Maximally-localized generalized Wannier functions for composite energy bands

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