A heavy-fermion state with singular density of states

被引：21

作者：

Ohara, K ^{[1
]}

Hanzawa, K ^{[1
]}

Yosida, K ^{[1
]}

机构：

[1] Sci Univ Tokyo, Fac Sci & Technol, Dept Phys, Noda, Chiba 2788510, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1999年 / 68卷 / 02期

关键词：

periodic Coqblin-Schrieffer model; heavy fermion; metamagnetism; non Fermi liquid; anisotropic hybridization; CeRu2Si2; CeNi2Ge2;

D O I：

10.1143/JPSJ.68.521

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The metamagnetic behavior of CeRu2Si2 and the non Fermi-liquid behavior of CeNi2Ge2 are described by the periodic Coqblin-Schrieffer model with anisotropic c-f exchange interaction in the mean-field theory. Only the Kramers doublet of M-J = +/-5/2 for the 4f states of Ce ions is considered, for the case of which the density of quasi-particle states has singularity of \omega\(-1/2) around the effective f-level energy. In the asymmetric case applicable to CeRu2Si2, the chemical potential reaches the singularity at a finite magnetic field, at which the magnetization shows a metamagnetic-like increase. On the other hand, in the symmetric case applicable to CeNi2Ge2: the chemical potential is on the singularity at zero magnetic field, and non-Fermi-liquid-like behaviors emerge in the susceptibility and the specific heat.

引用

页码：521 / 530

页数：10

共 50 条

[41] Thermoelectric power of heavy-fermion system YbCu5-xAgx [J].

Mitsuda, Akihiro ;

Yamauchi, Kiyonori ;

Tsujii, Naohito ;

Yoshimura, Kazuyoshi ;

Mizushima, Toshio ;

Isikawa, Yosikazu .

PHYSICA B-CONDENSED MATTER, 2006, 378-80 (SPEC. ISS.) :742-743

[42] Anisotropy in the electrical transport properties of the high-field heavy-fermion state in PrFe4P12 [J].

Aoki, Hidekazu ;

Kikuchi, Daisuke ;

Sugawara, Hitoshi ;

Aoki, Yuji ;

Sato, Hideyuki .

PHYSICA B-CONDENSED MATTER, 2006, 378-80 :215-216

[43] Pressure-induced small-moment order in heavy-fermion compounds [J].

Kawarazaki, S ;

Watanabe, K ;

Miyamura, M ;

Uwatoko, Y .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2000, 69 :53-59

[44] Weak ferromagnetic ordering in the anomalous field-insensitive heavy-fermion state in SMOs4Sb12 [J].

Aoki, Y. ;

Higemoto, W. ;

Tsunashima, Y. ;

Yonezawa, Y. ;

Satoh, K. H. ;

Koda, A. ;

Ito, T. U. ;

Ohishi, K. ;

Heffner, R. H. ;

Kikuchi, D. ;

Sato, H. .

PHYSICA B-CONDENSED MATTER, 2009, 404 (5-7) :757-760

[45] Observation of superconductivity in heavy-fermion compounds of Ce2CoIn8 [J].

Chen, GF ;

Ohara, S ;

Hedo, M ;

Uwatoko, Y ;

Saito, K ;

Sorai, M ;

Sakamoto, I .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2002, 71 (12) :2836-2838

[46] CeCu2: A new heavy-fermion superconductor near 6 GPa? [J].

Vargoz, E ;

Link, P ;

Jaccard, D .

PHYSICA B, 1997, 230 :182-185

[47] Is there more than one type of quantum critical points in heavy-fermion metals? [J].

Si, QM .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2001, 226 :30-34

[48] Development of Point-Contact Spectroscopy of Heavy-Fermion Superconductors under Pressure [J].

Sakai, Y. ;

Motoyama, G. ;

Yamaguchi, A. ;

Sumiyama, A. ;

Yamamura, A. ;

Sato, I. .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2012, 81

[49] Field dependence of the specific heat in a heavy-fermion superconductor CeIrIn5 [J].

Aoki, Yuya ;

Kittaka, Shunichiro ;

Sakakibara, Toshiro ;

Sakai, Akito ;

Nakatsuji, Satoru ;

Tsutsumi, Yasumasa ;

Ichioka, Masanori ;

Machida, Kazushige .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2012, 81

[50] Synthesis and characterization of the heavy-fermion compound CePtAl4Ge2 [J].

Shin, Soohyeon ;

Rosa, Priscila F. S. ;

Ronning, Filip ;

Thompson, Joe D. ;

Scott, Brian L. ;

Lee, Sangyun ;

Jang, Harim ;

Jung, Soon-Gil ;

Yun, Eunbhin ;

Lee, Hyoyoung ;

Bauer, Eric D. ;

Park, Tuson .

JOURNAL OF ALLOYS AND COMPOUNDS, 2018, 738 :550-555

← 1 2 3 4 5 →