3 papers
cond-mat.supr-con2025
Robustness of bipolaronic superconductivity to electron-density-phonon coupling
Chao Zhang
We study bipolaron formation and bipolaronic superconductivity on a square lattice, where electrons couple to both local Holstein phonons via on-site charge density and nonlocal bo…
cond-mat.supr-con2025
A comprehensive study of bond bipolaron superconductivity in triangular lattice
Chao Zhang
We employ the diagrammatic Monte Carlo method with a lattice path-integral formulation for both electron and phonon degrees of freedom to investigate the formation and properties o…
cond-mat.str-el2024
Effects of phonon dispersion on the bond-bipolaron superconductivity
Chao Zhang, Nikolay Prokof'ev, Boris Svistunov
We employ the diagrammatic Monte Carlo method based on lattice path-integral representaion of the particle sector and real-space diagrammatics of the phonon sector to study effects…