HIGH-PRESSURE TRANSPORT-PROPERTIES OF PURE YTTERBIUM IN THE METALLIC BCC PHASE

Transport properties of pure ytterbium have been measured under high p ressure, up to 91 kbar. The thermoelectric power in the fcc phase at 3 1 kbar is typical of an n-type semiconductor. The resistivity and the thermoelectric power could be determined between 22 and 91 kbar in the metallic bcc phase. In this pressure range, the electron-phonon inter action is predominant in the transport properties. Both resistivity an d thermoelectric power exhibit an increase of the Debye temperature by a factor 1. 5.