ANGLE-DEPENDENT MAGNETORESISTANCE OSCILLATIONS AND THERMOELECTRIC-POWER OF (BO)(2)CL(H2O)(X)

Magnetoresistance of the tittle organic metal, where BO is bis(ethylen edioxy)-tetrathiafulvalene, is investigated. The angle dependent oscil lations indicate the existence of cylindrical Fermi surface, and the o bserved periodicity is consistent with the calculated band structure. The amplitude of the oscillation is very small in the direction where the Fermi surface touches the zone boundary. The thermoelectric power is zero in the whole temperature range in all directions, suggesting e ffectively a half-filled situation of the band structure.