TO THE GIANT TRANSVERSE THERMOELECTRIC EFFECT IN HTSC MATERIALS

The transverse thermoelectric effect in HTSC films was analyzed theore tically concerning a plausible anisotropic electron-band structure whi ch was supposed to be weakly binding in Cu - O layers and tightly bind ing in the directions close to the c-axis. We have found interesting p eculiarities in the effect value as a function of the Fermi energy in the vicinity of the points which correspond to the boundaries of Brill ouin zones along the c-axis direction. At the first-zone boundary the effect is 5 times greater than its initial value. Then, if many zones are taken into account, it demonstrates a nonmonotone behavior strongl y depending on the band parameters (energy band widths and gaps) with a possible change in the sign of the effect.