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

Toshiki Yagi, Masayuki Ochi, Kazuhiko Kuroki

Pr${}_2$Ba${}_4$Cu${}_7$O${}_{15-\delta }$ is a unique member of cuprate superconductors where many studies suggest that CuO double chains are responsible for superconductivity. One characterist…