TY - JOUR
T1 - Thermoelectric properties of Ce(Ni, Pd)2Ge2 at low temperatures below 1 K
AU - Kuwai, T.
AU - Sun, P.
AU - Sugihara, T.
AU - Suzuki, H.
AU - Takeuchi, M.
AU - Mizushima, T.
AU - Mitsuda, A.
AU - Isikawa, Y.
AU - Fukuhara, T.
N1 - Funding Information:
The present work is supported by the Grant-in-Aid for Scientific Research (No.15540335) from the Ministry of Education, Culture, Sports, Science and Technology.
Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2006/5/1
Y1 - 2006/5/1
N2 - 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.
AB - 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.
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U2 - 10.1016/j.physb.2006.01.055
DO - 10.1016/j.physb.2006.01.055
M3 - Article
AN - SCOPUS:33646415632
VL - 378-380
SP - 146
EP - 147
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
SN - 0921-4526
IS - SPEC. ISS.
ER -