U. Wieser, U. Kunze, et al.
Physica E: Low-Dimensional Systems and Nanostructures
Ultrasonic attenuation and velocity have been measured in the high-Tc superconductor La1.85Ba0.15CuO4 at 24 MHz. On cooling, a pronounced softening of the lattice is observed, beginning above room temperature. Below 200 K, the lattice remains soft and highly attenuating, suggestive of a near-instability state over the entire range 4 K to 200 K, partial stiffening occurs, but the attenuation remains higher than at room temperature, a feature suggestive of a possible glassy state. © 1987.
U. Wieser, U. Kunze, et al.
Physica E: Low-Dimensional Systems and Nanostructures
J. Tersoff
Applied Surface Science
O.F. Schirmer, W. Berlinger, et al.
Solid State Communications
A. Gupta, R. Gross, et al.
SPIE Advances in Semiconductors and Superconductors 1990