Two-band Conduction and Nesting Instabilities in Superconducting Ba${}_2$CuO${}_{3+\delta }$: a First Principles Study

Hyo-Sun Jin, W. E. Pickett, K. -W. Lee

First principles investigations of the high temperature superconducting system Ba${}_2$CuO${}_{3+\delta }$, recently discovered at $\delta \approx 0.2$ at $T_c=70$ K, are applied to demonstrate the…