Charge density wave in the spin ladder of Sr${}_{14-x}$Ca${}_x$Cu${}_{24}$O${}_{41}$

Krzysztof Wohlfeld, Andrzej M. Oles, George A. Sawatzky

We consider a multiband charge transfer model for a single spin ladder describing the holes in Sr${}_{14-x}$Ca${}_x$Cu${}_{24}$O${}_{41}$. Using Hartree-Fock approximation we show how the…