Published September 1998
| Version v1
Journal article
Large Enhancement of Boron Carbides close-quote Seebeck Coefficients through Vibrational Softening
- 1. Sandia National Laboratories, Albuquerque, New Mexico 87185-1421 (United States)
- 2. Department of Physics and Astronomy, University of New Mexico, Albuquerque, New Mexico 87131-1156 (United States)
Description
We report measurements of the Seebeck coefficients of boron carbides having compositions B12+xC 3-x , 0.15<x<1.7 , from 6 to 900K. These Seebeck coefficients are large, ∼200 μ V/K at 300K, despite boron carbides having high carrier densities, ∼1021 cm-3 . The Seebeck coefficients also have unusual temperature dependencies and depend only weakly on carrier density. These exceptional properties can arise from boron carbides close-quote bipolaronic holes substantially softening the vibrational modes with which they interact. copyright 1998 The American Physical Society
Additional details
Publishing Information
- Journal Title
- Physical Review Letters
- Journal Volume
- 81
- Journal Issue
- 11
- Journal Page Range
- p. 2316-2319
- ISSN
- 0031-9007
- CODEN
- PRLTAO
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 30006353
- Subject category
- S36: MATERIALS SCIENCE; S30: DIRECT ENERGY CONVERSION;
- Descriptors DEI
- BORON CARBIDES; BORON COMPOUNDS; CARBON COMPOUNDS; CARRIER DENSITY; CHEMICAL COMPOSITION; POLARONS; SEEBECK EFFECT; TEMPERATURE DEPENDENCE; THERMOELECTRICITY; VIBRATIONAL STATES
- Descriptors DEC
- BORON COMPOUNDS; CARBIDES; CARBON COMPOUNDS; ELECTRICITY; ENERGY LEVELS; EXCITED STATES; QUASI PARTICLES