Unconventional Transition from Metallic to Insulating Resistivity in the Spin-ladder Compound (Sr,Ca)${}_{14}$Cu${}_{24}$O${}_{41}$

F. F. Balakirev, J. B. Betts, G. S. Boebinger +3

Spin-ladder compounds make interesting analogs of the high-temperature superconductors, because they contain layers of nearly one-dimensional "ladders" consisting of a square array…