Possible counterintuitive enhancement of superconductivity in ladder-type cuprates by longitudinal compression

Abstract

We theoretically study the effect of uniaxial deformation of ladder-type cuprate superconductors. Model construction based on first principles calculation shows that the rung-to-leg ratio of the nearest neighbor hoppings counterintuitively increases when the lattice is compressed in the longitudinal (leg) direction. This leads to an enhancement of the superconducting transition temperature, which intuitively is expected when compressed in the rung direction. Such a trend is traced back to the on-site hybridization between Cu$4s$ and Cu$d_{x^2-y^2}$ orbitals, which varies and changes sign upon lattice deformation.

7 pages, 6 figures (including supplemental material)

References in corpus (9)

• Two-Orbital Model Explains the Higher Transition Temperature of the Single-Layer Hg-Cuprate Superconductor Compared to That of the La-Cuprate Superconductor
• Superconductivity in repulsively interacting fermions on a diamond chain: flat-band induced pairing
• Observation of strong electron pairing on bands without Fermi surfaces in LiFe1-xCoxAs
• New class of flat-band models on tetragonal and hexagonal lattices: Gapped versus crossing flat bands
• Effective pairing interaction in a system with an incipient band
• Wide applicability of high $T_c$ pairing originating from coexisting wide and incipient narrow bands in quasi one dimension
• Strongly enhanced superconductivity due to finite energy spin fluctuations induced by an incipient band : a FLEX study on the bilayer Hubbard model with vertical and diagonal interlayer hoppings
• Possible high-$T_c$ superconductivity due to incipient narrow bands originating from hidden ladders in Ruddlesden-Popper compounds
• Many-variable variational Monte-Carlo study of superconductivity in two-band Hubbard models with an incipient band

Cited by in corpus (7)

• Possible high $T_c$ Superconductivity in La${}_3$Ni${}_2$O${}_7$ under High Pressure through Manifestation of a Nearly-Half-Filled Bilayer Hubbard Model
• Superconducting mechanism for the cuprate Ba${}_2$CuO${}_{3+\delta }$ based on a multiorbital Lieb lattice model
• Designing nickelate superconductors with $d^8$ configuration exploiting mixed-anion strategy
• Theoretical study of spin-fluctuation-mediated superconductivity in two-dimensional Hubbard models with an incipient flat band
• Many-body effects on high-harmonic generation in Hubbard ladders
• Theoretical analysis of the origin of the double-well band dispersion in the CuO double chains of Pr${}_2$Ba${}_4$Cu${}_7$O${}_{15-\delta }$ and its impact on superconductivity
• Coupled Hubbard ladders at weak coupling: Pairing and spin excitations