One-dimensional spin-orbital model perturbed by Hund coupling

被引：0
|
作者：
Lee, HC
Azaria, P
Boulat, E
机构：
[1] Sungkyunkwan Univ, Dept Phys, Div Res Phys, Suwon 440746, South Korea
[2] Sungkyunkwan Univ, Inst Basic Sci, Suwon 440746, South Korea
[3] Sogang Univ, Dept Phys, Seoul 100611, South Korea
[4] Univ Paris 06, Phys Theor Liquides Lab, F-75252 Paris, France
来源：
PHYSICA B-CONDENSED MATTER | 2003年 / 329卷
关键词：
Hund coupling; spin-orbital model; renormalization group;
D O I：
10.1016/S0921-4526(02)02616-9
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The one-dimensional spin-orbital model perturbed by Hund coupling is studied by renormalization group and bosonization methods. The Hund coupling breaks the SU(4) spin-orbital symmetry into SU(2)(spin) x U(1)(orbital) at weak coupling fixed point. The one-loop renormalization group analysis shows that the Hund coupling is relevant irrespective of Coulomb repulsion. When Coulomb repulsion is larger than Hund coupling, the spin-orbital physics in strong coupling regime is described by SO(6) Gross-Neveu model, where the spin and orbital excitations are gapped. When the Hund coupling is much larger than the Coulomb repulsion, the strong coupling regime is described by the two coupled SO(3)(spin) x SO(3)(orbital) Gross-Neveu model, where again the spin and orbital excitations are gapped. (C) 2003 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：946 / 947
页数：2
相关论文
共 50 条
  • [41] Competition between Hund's coupling and Kondo effect in a one-dimensional extended periodic Anderson model
    Hagymasi, I.
    Solyom, J.
    Legeza, Oe.
    [J]. PHYSICAL REVIEW B, 2015, 92 (03)
  • [42] Excitations in the anisotropic spin-orbital model
    Bala, J
    Oles, AM
    Sawatzky, GA
    [J]. PHYSICAL REVIEW B, 2001, 63 (13):
  • [43] SPIN COATING - ONE-DIMENSIONAL MODEL
    BORNSIDE, DE
    MACOSKO, CW
    SCRIVEN, LE
    [J]. JOURNAL OF APPLIED PHYSICS, 1989, 66 (11) : 5185 - 5193
  • [44] Spin-orbital state induced by strong spin-orbit coupling
    Onishi, Hiroaki
    [J]. INTERNATIONAL CONFERENCE ON STRONGLY CORRELATED ELECTRON SYSTEMS (SCES 2011), 2012, 391
  • [45] Dynamic phase transitions in the one-dimensional spin-phonon coupling model
    Apetrei, Alin Marian
    Boukheddaden, Kamel
    Stancu, Alexandru
    [J]. PHYSICAL REVIEW B, 2013, 87 (01):
  • [46] Temperature effects in a spin-orbital model for manganites
    Daghofer, M
    Neuber, DR
    Oles, AM
    von der Linden, W
    [J]. PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, 2006, 243 (01): : 277 - 280
  • [47] Elementary Excitations in the Symmetric Spin-Orbital Model
    Kagan, M. Yu
    Kugel, K. I.
    Mikheyenkov, A. V.
    Barabanov, A. F.
    [J]. JETP LETTERS, 2014, 100 (03) : 187 - 191
  • [48] Spin-orbital correlations in the two-orbital Hubbard model
    Romano, Alfonso
    Guerra, Delia
    Forte, Filomena
    Noce, Canio
    [J]. EUROPEAN PHYSICAL JOURNAL PLUS, 2023, 138 (05):
  • [49] Three-dimensional topological phases in a layered honeycomb spin-orbital model
    Chern, Gia-Wei
    [J]. PHYSICAL REVIEW B, 2010, 81 (12)
  • [50] Elementary excitations in the symmetric spin-orbital model
    M. Yu. Kagan
    K. I. Kugel
    A. V. Mikheyenkov
    A. F. Barabanov
    [J]. JETP Letters, 2014, 100 : 187 - 191
12345