Giant Nernst Effect and Bipolarity in the Quasi-One-Dimensional Metal Li0.9Mo6O17

Autor(es)

Cohn, J. L. ^[1] ; White, B. D. ^[2] ; dos Santos, C. A. M. ^[3] ; Neumeier, J. J. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Miami, Dept Phys, Coral Gables, FL 33124 - USA

^[2] Montana State Univ, Dept Phys, Bozeman, MT 59717 - USA

^[3] Escola Engn Lorena USP, BR-12602810 Lorena, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Physical Review Letters; v. 108, n. 5 FEB 2 2012.
• Citações Web of Science: 18

Resumo

The Nernst coefficient for the quasi-one-dimensional metal, Li0.9Mo6O17, is found to be among the largest known for metals (nu similar or equal to 500 mu V/KT at T similar to 20 K), and is enhanced in a broad range of temperature by orders of magnitude over the value expected from Boltzmann theory for carrier diffusion. A comparatively small Seebeck coefficient implies that Li0.9Mo6O17 is bipolar with large, partial Seebeck coefficients of opposite sign. A very large thermomagnetic figure of merit, ZT similar to 0.5, is found at high field in the range T approximate to 35-50 K. (AU)

• Processo FAPESP: 09/14524-6 - Re-liquefatora para uso em MagLab Oxford de 9T
• Beneficiário: Carlos Alberto Moreira dos Santos
• Modalidade de apoio: Auxílio à Pesquisa - Regular