Pressure effects on the electronic properties and superconductivity in the $\beta$-pyrochlore oxides: $A$Os${}_2$O${}_6$ ($A$ = Na, K, Rb, Cs)

R. Saniz, A. J. Freeman

We present a first-principles study of the electronic structure and superconducting parameters of the compounds $A$Os${}_2$O${}_6$ ($A$ = Na, K, Rb, and Cs) and at ambient and applied…