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Thermoelectric power in the normal state of Chevrel-phase superconductors of the type Cu<inf>1.8</inf>Mo<inf>6</inf>S<inf>8-y</inf>Se<inf>y</inf>, 0y8, and Cu<inf>1.8</inf>Mo<inf>6</inf>S<inf>8-y</inf>Te<inf>y</inf>, 0y4
Date Issued
01-12-1984
Author(s)
Vasudeva Rao, V.
Rangarajan, G.
Srinivasan, R.
Abstract
The thermoelectric power, S, of Chevrel-phase superconductors of the type Cu1.8Mo6S8-ySey, 0<y<8, and Cu1.8Mo6S8-yTey, 0<y<4, have been measured between 300K and the superconducting transition temperature. The high-temperature values are found to arise mainly from the diffusion of conduction electrons while at low temperatures phonon-drag contributions are also observed. The diffusion thermopower is interpreted in terms of Mott-Wilson theory and band-structure data. The phonon specific heat has also been measured in the case of Cu1.8Mo6S8 and Cu 1.8Mo6S1Se7 and is shown to be proportional to the phonon-drag part of the thermopower.
Volume
14