Acoustoelectric effect of superconducting YBa2Cu3O7-x films
Ilisavskii Yu.I., Yakhkund E. Z. , Gol'man E. K. , Mitrofanov A. P.
An acoustoelectric effect has been studied in a layered structure consisting of YZ-LiNb03 and a superconducting YBa2Cu307 _ x film. At 300 К the acoustic voltage has a positive sign, i.e., it corresponds to a hole conductivity. At Г< Tc = 98 К the acoustic voltage decreases sharply to-zero (at 95 К), changes sign, and increases in absolute value to a maximum at Τ = 90 К (R — 0). It then decreases to zero at 78-81 K.