Effects of Ca substitution on quasi-acoustic sliding modes in Sr${}_{14-x}$Ca${}_x$Cu${}_{24}$O${}_{41}$

E. Constable, A. D. Squires, J. Horvat +8

The low energy lattice dynamics of the quasi-periodic spin-ladder cuprate Sr${}_{14-x}$Ca${}_x$Cu${}_{24}$O${}_{41}$ are investigated using terahertz frequency synchrotron radiation. A hig…