A Heavy-Fermion State with Singular Density of States
作者： Keiichi Ohara , Katsurou Hanzawa , Kei Yosida
DOI: 10.1143/JPSJ.68.521
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摘要: The metamagnetic behavior of CeRu 2 Si and the non Fermi-liquid CeNi Ge are described by periodic Coqblin-Schrieffer model with anisotropic c - f exchange interaction in mean-field theory. Only Kramers doublet M J =±5/2 for 4 states Ce ions is considered, case which density quasi-particle has singularity | ω| -1/2 around effective -level energy. In asymmetric applicable to , chemical potential reaches at a finite magnetic field, magnetization shows metamagnetic-like increase. On other hand, symmetric on zero non-Fermi-liquid-like behaviors emerge susceptibility specific heat.
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G. Knebel, C. Eggert, T. Schmidt, A. Krimmel, M. Dressel, A. Loidl, Non-fermi liquid behavior in Ce(Cu(in1−xNix)2Ge2 and CeCu2(Si1−yGey)2 Physica B-condensed Matter. ,vol. 230, pp. 593- 595 ,(1997) , 10.1016/S0921-4526(96)00756-9
Specific Heat Study of Non-Fermi Liquid Behavior in CeNi2Ge2:Anomalous Peak in Quasi-Particle Density-of-States Journal of the Physical Society of Japan. ,vol. 66, pp. 2993- 2996 ,(1997) , 10.1143/JPSJ.66.2993
T. Sakakibara, H. Amitsuka, D. Sugimoto, H. Mitamura, K. Matsuhira, Single-site and inter-site effects in diluted heavy fermion compounds Physica B: Condensed Matter. ,vol. 186-188, pp. 317- 322 ,(1993) , 10.1016/0921-4526(93)90564-M
Yoshichika Ōnuki, Izuru Umehara, Ariane Keiko Albessard, Takao Ebihara, Kazuhiko Satoh, Magnetoresistance and de Haas-van Alphen effect in CeRu 2 Si 2 and LaRu 2 Si 2 Journal of the Physical Society of Japan. ,vol. 61, pp. 960- 968 ,(1992) , 10.1143/JPSJ.61.960
Piers Coleman, New approach to the mixed-valence problem Physical Review B. ,vol. 29, pp. 3035- 3044 ,(1984) , 10.1103/PHYSREVB.29.3035
Kazumasa Miyake, Hiroaki Ikeda, A Theory of Anisotropic Semiconductor of Heavy Fermions Journal of the Physical Society of Japan. ,vol. 65, pp. 1769- 1781 ,(1996) , 10.1143/JPSJ.65.1769
B. Coqblin, J. R. Schrieffer, Exchange Interaction in Alloys with Cerium Impurities Physical Review. ,vol. 185, pp. 847- 853 ,(1969) , 10.1103/PHYSREV.185.847
T. Sakakibara, T. Tayama, K. Matsuhira, H. Mitamura, H. Amitsuka, K. Maezawa, Y. Ōnuki, ABSENCE OF A FIRST-ORDER METAMAGNETIC TRANSITION IN CERU2SI2 Physical Review B. ,vol. 51, pp. 12030- 12033 ,(1995) , 10.1103/PHYSREVB.51.12030
Hiroshi Yamagami, Akira Hasegawa, Electronic Structure and Fermi Surface of LaRu2Si2 Journal of the Physical Society of Japan. ,vol. 61, pp. 2388- 2398 ,(1992) , 10.1143/JPSJ.61.2388
H. P. van der Meulen, A. de Visser, J. J. M. Franse, T. T. J. M. Berendschot, J. A. A. J. Perenboom, H. van Kempen, A. Lacerda, P. Lejay, J. Flouquet, Field suppression of the heavy-fermion state in CeRu2Si2 Physical Review B. ,vol. 44, pp. 814- 818 ,(1991) , 10.1103/PHYSREVB.44.814