Anomalous charge transport in CeB{sub 6}

Journal Article · Fri Sep 15 04:00:00 EDT 2006 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2006.01.016· OSTI ID:20905442

Ignatov, M I ^[1]; Bogach, A V ^[2]; Demishev, S V ^[2]; Glushkov, V V ^[2]; Levchenko, A V ^[3]; Paderno, Yu B ^[3]; Shitsevalova, N Yu ^[3]; Sluchanko, N E ^[2]

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1. A.M.Prokhorov General Physics Institute of RAS, 38, Vavilov street, Moscow 119991 (Russian Federation) and Moscow Institute of Physics and Technology, 9, Institutskii per., Dolgoprudny, Moscow region 141700 (Russian Federation)
2. A.M.Prokhorov General Physics Institute of RAS, 38, Vavilov street, Moscow 119991 (Russian Federation)
3. Institute for Problems of Materials Science, UA-252680 Kiev (Ukraine)

The comprehensive study of conductivity {sigma}, Hall coefficient R{sub H} and Seebeck coefficient S has been carried out on high-quality single crystals of CeB{sub 6} in a wide range of temperatures 1.8-300K. An anomalous behavior of all transport characteristics ({sigma}, R{sub H}, S) was found for the first time in the vicinity of T*{approx}80K. The strong decrease of conductivity {sigma} as well as the unusual asymptotic behavior of Seebeck coefficient S(T){approx}-lnT observed below T* allowed us to conclude in favor of crossover between different regimes of charge transport in CeB{sub 6}. The pronounced change of Hall mobility {mu}{sub H}, which diminishes from the maximum value of 20cm{sup 2}/(Vs) at T* to the values of {approx}6cm{sup 2}/(Vs) at T{approx}10K, 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.

• OSTI ID: 20905442
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 9 Vol. 179; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CERIUM BORIDES
CHARGE CARRIERS
CHARGE TRANSPORT
FLUCTUATIONS
MONOCRYSTALS
SCATTERING
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0013-0065 K
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K