Anomalous charge transport in CeB6
| Autor: | M.I. Ignatov, V. V. Glushkov, N. Yu. Shitsevalova, A. V. Bogach, Sergey Demishev, Yu. B. Paderno, N. E. Sluchanko, A. V. Levchenko |
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| Rok vydání: | 2006 |
| Předmět: |
Range (particle radiation)
Condensed matter physics Scattering Chemistry Charge (physics) General Medicine Conductivity Condensed Matter Physics Electronic Optical and Magnetic Materials Inorganic Chemistry Hall effect Electrical resistivity and conductivity Seebeck coefficient Thermoelectric effect Materials Chemistry Ceramics and Composites Charge carrier Kondo effect Physical and Theoretical Chemistry Spin-½ |
| Zdroj: | Journal of Solid State Chemistry. 179:2805-2808 |
| ISSN: | 0022-4596 |
| DOI: | 10.1016/j.jssc.2006.01.016 |
| Popis: | The comprehensive study of conductivity σ , Hall coefficient R H and Seebeck coefficient S has been carried out on high-quality single crystals of CeB 6 in a wide range of temperatures 1.8–300 K. An anomalous behavior of all transport characteristics ( σ , R H , S ) was found for the first time in the vicinity of T * ≈80 K. The strong decrease of conductivity σ as well as the unusual asymptotic behavior of Seebeck coefficient S ( T )∼−ln T observed below T * allowed us to conclude in favor of crossover between different regimes of charge transport in CeB 6 . The pronounced change of Hall mobility μ H , which diminishes from the maximum value of 20 cm 2 /(V s) at T * to the values of ∼6 cm 2 /(V s) at T ∼10 K, seems to be attributed to the strong enhancement of charge carriers scattering due to fast spin fluctuations on Ce-sites. The low-temperature anomalies of the charge transport characteristics are compared with the predictions of the Kondo-lattice model. |
| Databáze: | OpenAIRE |
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