Reconciling field-theoretical and semiclassical approaches to quantum 2D antiferromagnets

被引:0
作者
Beard, BB
Cuccoli, A
Vaia, R
Verrucchi, P
机构
[1] Univ Florence, Dipartimento Fis, I-50019 Sesto Fiorentino, FI, Italy
[2] Christian Brothers Univ, Dept Phys & Mech Engn, Memphis, TN 38104 USA
[3] INFM, Unita Ric Firenze, I-50019 Sesto Fiorentino, FI, Italy
[4] CNR, Ist Fis Applicata Nello Carrara, I-50019 Sesto Fiorentino, FI, Italy
关键词
2D antiferromagnet; non-linear sigma model; semiclassical methods; effective Hamiltonian; field theory;
D O I
10.1016/j.jmmm.2003.12.1149
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We show that, starting from the field-theoretical expression for the correlation length xi of the 2D quantum Heisenberg antiferromagnet corrected for cut-off effects and our knowledge of the classical thermodynamics of the model, the observed temperature dependence of can be reproduced. We find also that the cut-off effects contains the same pure-quantum renormalizations of the pure-quantum self-consistent harmonic approximation semiclassical framework: the gap between quantum field theoretical and semiclassical results is thus bridged. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码:892 / 893
页数:2
相关论文
共 11 条
  • [1] Reconciliation of the correlation length for high-spin Heisenberg antiferromagnets
    Beard, BB
    [J]. NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS, 2000, 83-4 : 682 - 684
  • [2] Square-lattice Heisenberg antiferromagnet at very large correlation lengths
    Beard, BB
    Birgeneau, RJ
    Greven, M
    Wiese, UJ
    [J]. PHYSICAL REVIEW LETTERS, 1998, 80 (08) : 1742 - 1745
  • [3] LOW-TEMPERATURE BEHAVIOR OF TWO-DIMENSIONAL QUANTUM ANTIFERROMAGNETS
    CHAKRAVARTY, S
    HALPERIN, BI
    NELSON, DR
    [J]. PHYSICAL REVIEW LETTERS, 1988, 60 (11) : 1057 - 1060
  • [4] TWO-DIMENSIONAL QUANTUM HEISENBERG-ANTIFERROMAGNET AT LOW-TEMPERATURES
    CHAKRAVARTY, S
    HALPERIN, BI
    NELSON, DR
    [J]. PHYSICAL REVIEW B, 1989, 39 (04) : 2344 - 2371
  • [5] Two-dimensional quantum Heisenberg antiferromagnet: Effective-Hamiltonian approach to the thermodynamics
    Cuccoli, A
    Tognetti, V
    Vaia, R
    Verrucchi, P
    [J]. PHYSICAL REVIEW B, 1997, 56 (22): : 14456 - 14468
  • [6] Temperature and spin dependent correlation length of the quantum Heisenberg antiferromagnet on the square lattice
    Cuccoli, A
    Tognetti, V
    Vaia, R
    Verrucchi, P
    [J]. PHYSICAL REVIEW LETTERS, 1996, 77 (16) : 3439 - 3442
  • [7] SPIN DEPENDENCE OF CORRELATIONS IN 2-DIMENSIONAL SQUARE-LATTICE QUANTUM HEISENBERG ANTIFERROMAGNETS
    ELSTNER, N
    SOKOL, A
    SINGH, RRP
    GREVEN, M
    BIRGENEAU, RJ
    [J]. PHYSICAL REVIEW LETTERS, 1995, 75 (05) : 938 - 941
  • [8] The correlation length of the Heisenberg antiferromagnet with arbitrary spin S
    Hasenfratz, P
    [J]. EUROPEAN PHYSICAL JOURNAL B, 2000, 13 (01) : 11 - 14
  • [9] THE EXACT CORRELATION LENGTH OF THE ANTIFERROMAGNETIC D=2+1 HEISENBERG-MODEL AT LOW-TEMPERATURES
    HASENFRATZ, P
    NIEDERMAYER, F
    [J]. PHYSICS LETTERS B, 1991, 268 (02) : 231 - 235
  • [10] MAGNETIC EXCITATIONS IN PURE, LIGHTLY DOPED, AND WEAKLY METALLIC LA2CUO4
    KEIMER, B
    BELK, N
    BIRGENEAU, RJ
    CASSANHO, A
    CHEN, CY
    GREVEN, M
    KASTNER, MA
    AHARONY, A
    ENDOH, Y
    ERWIN, RW
    SHIRANE, G
    [J]. PHYSICAL REVIEW B, 1992, 46 (21): : 14034 - 14053