THE CONDUCTION MECHANISM AND THERMOELECTRIC PHENOMENON IN IN6S7 LAYERCRYSTALS

In the present paper, measurements of the electrical conductivity and Hall coefficient on a single crystal of ln(6)S(7), grown by a new crys tal growth technique, were made. The crystal was found to be of n-type conductivity. The low-conductivity sample showed as the most striking feature an exponential increase of the Hall mobility with temperature . This effect was explained by assuming a mixed conduction and differe nt scattering mechanisms for electrons and holes in the same temperatu re range. We have also made thermoelectric power measurements to suppo rt this assumption. An energy gap of 0.64 eV was found.