Valence instability in an extended periodic Anderson model

被引：4
|
作者：
Saiga, Y. [1 ]
Sugibayashi, T. [1 ]
Hirashima, D. S. [1 ]
机构：
[1] Nagoya Univ, Dept Phys, Nagoya, Aichi 4648602, Japan
来源：
PHYSICA B-CONDENSED MATTER | 2008年 / 403卷 / 5-9期
关键词：
heavy fermions; valence instability; extended periodic Anderson models; dynamical mean field theory;
D O I：
10.1016/j.physb.2007.10.176
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The valence instability in an extended periodic Anderson model is studied with the dynamical mean field theory combined with exact diagonalization. It is found that at fixed total electron number (n(tot) = 1.75), the f-electron number is rapidly decreased against the f-electron level in the presence of the repulsive interaction U-cf between a conduction electron and an f electron. This implies the enhancement of valence fluctuations due to U-cf. In addition, a first-order valence transition is likely to occur, provided the c-f mixing is small and Ucf is large enough to be comparable to the bandwidth of conduction electrons. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：808 / 809
页数：2
相关论文
共 50 条
  • [1] Valence Instability in an Extended Periodic Anderson Model with Degenerate Orbitals
    Sugibayashi, Takashi
    Saiga, Yasuhiro
    Hirashima, Dai S.
    [J]. JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2008, 77 : 278 - 280
  • [2] Valence Fluctuations in an Extended Periodic Anderson Model
    Sugibayashi, Takashi
    Hirashima, Dai S.
    [J]. JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2006, 75 : 244 - 246
  • [3] DMFT Study for Valence Fluctuations in the Extended Periodic Anderson Model
    Shinzaki, Ryu
    Nasu, Joji
    Koga, Akihisa
    [J]. TMU INTERNATIONAL SYMPOSIUM ON NEW QUANTUM PHASES EMERGING FROM NOVEL CRYSTAL STRUCTURE, 2016, 683
  • [4] Mass enhancement in an extended periodic Anderson model with valence fluctuations
    Kubo, Katsunori
    [J]. INTERNATIONAL CONFERENCE ON STRONGLY CORRELATED ELECTRON SYSTEMS (SCES 2011), 2012, 391
  • [5] Valence fluctuations in an extended periodic anderson model under a magnetic field
    Sugibayashi, T.
    Tsuruta, A.
    Miyake, K.
    [J]. PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2010, 470 : S550 - S551
  • [6] Valence Instability and the Quantum Critical Point in an Extended Periodic Anderson Model: Analysis Based on the Dynamical Mean Field Theory
    Saiga, Yasuhiro
    Sugibayashi, Takashi
    Hirashima, Dai S.
    [J]. JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2008, 77 (11)
  • [7] Valence transition in the periodic Anderson model
    Huebsch, A.
    Becker, K. W.
    [J]. EUROPEAN PHYSICAL JOURNAL B, 2006, 52 (03): : 345 - 353
  • [8] Valence transition in the periodic Anderson model
    A. Hübsch
    K. W. Becker
    [J]. The European Physical Journal B - Condensed Matter and Complex Systems, 2006, 52 : 345 - 353
  • [9] Superconducting instability in the periodic Anderson model
    Tahvildar-Zadeh, AN
    Hettler, MH
    Jarrell, M
    [J]. PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES, 1998, 78 (04): : 365 - 374
  • [10] Valence transition in the extended Anderson lattice model
    Romano, A
    Noce, C
    Citro, R
    [J]. SOLID STATE COMMUNICATIONS, 1997, 104 (10) : 623 - 627
12345