Transverse thermoelectric power in the molybdenum blue bronze K0.3MoO3

Transverse thermoelectric power (TEP) along the [102] direction (S[102]) was measured in a series of pure or doped potassium blue bronzes from 80 to 300 K. With the temperature increases, unlike that along the b axis (Sb), S[102] gradually deviates from typical semiconductor behavior and metallic behavior below and above the Peierls transition (Tp), respectively. These departures were qualitatively understood in the scenario of the transverse tunnelling among the 1D chains, which can be consolidated with the significant influence of the alkali doping in the samples