Thermopower behavior in ${\mathrm{La}}_2$${\mathrm{Mo}}_2$${\mathrm{O}}_7$: A possible charge-density-wave system with partial Fermi-surface nesting

Thermoelectric power and resistivity measurements were carried out on the bronzelike compound ${\mathrm{La}}_2$${\mathrm{Mo}}_2$${\mathrm{O}}_7$ in the temperature range 95–210 K. The observed temperature dependence was analyzed using an expression of the type -αT+β/T to separate the metallic and semiconducting contributions to the thermopower. Such an analysis should be valid for other similar systems where there is only a partial Fermi-surface nesting below the Peierls transition.