Ap. Saiko et al., ON THE ANOMALOUS BEHAVIOR OF THE ELASTIC PROPERTIES OF HTSC BI2SR2CA1CU2O8 COMPOUND, Fizika nizkih temperatur, 20(9), 1994, pp. 968-970
A theoretical explanation of the temperature hysteresis of ultrasonic
longitudinal wave velocity in the high-T(c) compound Bi2Sr2Ca1Cu2O8 ha
s been advanced. The explanation is obtained taking into account the c
ubic interaction term connecting the square displacement of the bistab
le oxygen sublattice with the deformation of the host lattice.