材料期刊网

The thermoelectric power (TEP) of the quasi-one-dimensional charge-density-wave (CDW) conductors rubidium blue bronze Rb0.3MoO3 and its alloy Rb0.15K0.15MoO3 were measured in the temperature range 80-280 K. The result showed a sign change from a small positive value to a great negative value where the Peierls transition temperatures (T-p) are 183 and 180 K for Rb0.3MoO3 and Rb0.15K0.15MoO3, respectively. Above T-p, the TEP for both samples can be described with the empirical relation S=AT+B; while below T-p, the TEP fits well the relation S=AT+B/T based on the experimental data. The Fermi energies epsilon(F) for Rb0.3MoO3 and Rb0.15K0.15MoO3 are estimated to be 1.55 and 0.53 eV, respectively. (C) 2004 Elsevier Ltd. All rights reserved.