title: High-pressure Seebeck coefficients and thermoelectric behaviors of Bi and PbTe measured using a Paris-Edinburgh cell.
abstract: A new sample cell assembly design for the Paris-Edinburgh type large-volume press for simultaneous measurements of X-ray diffraction, electrical resistance, Seebeck coefficient and relative changes in the thermal conductance at high pressures has been developed. The feasibility of performing in situ measurements of the Seebeck coefficient and thermal measurements is demonstrated by observing well known solid-solid phase transitions of bismuth (Bi) up to 3 GPa and 450 K. A reversible polarity flip has been observed in the Seebeck coefficient across the Bi-I to Bi-II phase boundary. Also, successful Seebeck coefficient measurements have been performed for the classical high-temperature thermoelectric material PbTe under high pressure and temperature conditions. In addition, the relative change in the thermal conductivity was measured and a relative change in ZT, the dimensionless figure of merit, is described. This new capability enables pressure-induced structural changes to be directly correlated to electrical and thermal properties.
authors: HiPSEC and Department of Physics, University of Nevada, Las Vegas, 4505 South Maryland Parkway, Las Vegas, NV 89154, USA.
authors: Jason
authors: J
authors: Baker
authors: HiPSEC and Department of Physics, University of Nevada, Las Vegas, 4505 South Maryland Parkway, Las Vegas, NV 89154, USA.
authors: Ravhi
authors: R
authors: Kumar
authors: HPCAT, Geophysical Laboratory, Carnegie Institution of Washington, 9700 South Cass Avenue, Argonne, IL 60439, USA.
authors: Changyong
authors: C
authors: Park
authors: HPCAT, Geophysical Laboratory, Carnegie Institution of Washington, 9700 South Cass Avenue, Argonne, IL 60439, USA.
authors: Curtis
authors: C
authors: Kenney-Benson
authors: HiPSEC and Department of Physics, University of Nevada, Las Vegas, 4505 South Maryland Parkway, Las Vegas, NV 89154, USA.
authors: Andrew
authors: A
authors: Cornelius
authors: Shock and Detonation Physics Group, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
authors: Nenad
authors: N
authors: Velisavljevic
keywords: Paris-Edinburgh press; Seebeck coefficient; high pressure; thermal conductivity; thermoelectrics