Thermoelectric properties of Ce(Ni, Pd)2Ge2 at low temperatures below 1 K

T. Kuwai, P. Sun, T. Sugihara, H. Suzuki, M. Takeuchi, T. Mizushima, A. Mitsuda, Y. Isikawa, T. Fukuhara

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Abstract

Thermoelectric power S of single crystals for a nonmagnetic heavy fermion compound CeNi2Ge2 and for the alloys of Ce(Ni1-xPdx)2Ge2 was investigated well below 1 K. S/T, S divided by temperature T, logarithmically increases with lowering temperature below 10 K, approaching a large magnitude of about 10 μV/K2 in the lowest temperatures along the c-axis of a tetragonal crystal structure for the sample with x=0.06. This behavior strikingly coincides with the temperature dependence of C/T which leads to a large Sommerfeld coefficient γ of 630 mJ/K2 mol in the zero-temperature limit. On the other hand, S/T for CeNi2Ge2 shows a complex temperature dependence at low temperatures in both axes, and is different from its C/T behavior. These results are regarded as the consequence originating from a non-Fermi-liquid nature evolved at low temperatures in the vicinity of the antiferromagnetic quantum critical point.

Original languageEnglish
Pages (from-to)146-147
Number of pages2
JournalPhysica B: Condensed Matter
Volume378-380
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - May 1 2006
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

Kuwai, T., Sun, P., Sugihara, T., Suzuki, H., Takeuchi, M., Mizushima, T., ... Fukuhara, T. (2006). Thermoelectric properties of Ce(Ni, Pd)2Ge2 at low temperatures below 1 K. Physica B: Condensed Matter, 378-380(SPEC. ISS.), 146-147. https://doi.org/10.1016/j.physb.2006.01.055