Spin-1/2 XXZ Chain System Cs2CoCl4 in a Transverse Magnetic Field

被引：40

作者：

Breunig, O. ^{[1
]}

Garst, M. ^{[2
]}

Sela, E. ^{[2
,3
]}

Buldmann, B. ^{[2
]}

Becker, P. ^{[4
]}

Bohaty, L. ^{[4
]}

Mueller, R. ^{[1
]}

Lorenz, T. ^{[1
]}

机构：

[1] Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany

[2] Univ Cologne, Inst Theoret Phys, D-50937 Cologne, Germany

[3] Tel Aviv Univ, Raymond & Beverly Sackler Sch Phys & Astron, IL-69978 Tel Aviv, Israel

[4] Univ Cologne, Inst Kristallog, D-50939 Cologne, Germany

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 111卷 / 18期

关键词：

QUANTUM; MODEL; ORDER;

D O I：

10.1103/PhysRevLett.111.187202

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Comparing high-resolution specific heat and thermal expansion measurements to exact finite-size diagonalization, we demonstrate that Cs2CoCl4 for a magnetic field along the crystallographic b axis realizes the spin-1/2 XXZ chain in a transverse field. Exploiting both thermal as well as virtual excitations of higher crystal-field states, we find that the spin chain is in the XY limit with an anisotropy J(z)/J(perpendicular to) approximate to 0.12, substantially smaller than previously believed. A spin-flop Ising quantum phase transition occurs at a critical field of mu H-0(b)cr approximate to 2 T before around 3.5 T the description in terms of an effective spin-1/2 chain becomes inapplicable.

引用

收藏

页数：5

相关论文

共 23 条

[1] Thermodynamic behavior of the XXZ Heisenberg s=1/2 chain around the factorizing magnetic field [J].

Abouie, J. ;

Langari, A. ;

Siahatgar, M. .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2010, 22 (21)

[2] HEAT-CAPACITY OF CS2COCL4 BELOW 1K, COMPARED WITH S=1/2 LINEAR-CHAIN XY MODEL [J].

ALGRA, HA ;

DEJONGH, LJ ;

BLOTE, HWJ ;

HUISKAMP, WJ ;

CARLIN, RL .

PHYSICA B & C, 1976, 82 (02) :239-246

[3] Spin-spin correlations of the spin-ladder compound (C5H12N)2CuBr4 measured by magnetostriction and comparison to quantum Monte Carlo results [J].

Anfuso, Fabrizio ;

Garst, Markus ;

Rosch, Achim ;

Heyer, Oliver ;

Lorenz, Thomas ;

Rueegg, Christian ;

Kraemer, Karl .

PHYSICAL REVIEW B, 2008, 77 (23)

[4] The ALPS project release 2.0: open source software for strongly correlated systems [J].

Bauer, B. ;

Carr, L. D. ;

Evertz, H. G. ;

Feiguin, A. ;

Freire, J. ;

Fuchs, S. ;

Gamper, L. ;

Gukelberger, J. ;

Gull, E. ;

Guertler, S. ;

Hehn, A. ;

Igarashi, R. ;

Isakov, S. V. ;

Koop, D. ;

Ma, P. N. ;

Mates, P. ;

Matsuo, H. ;

Parcollet, O. ;

Pawlowski, G. ;

Picon, J. D. ;

Pollet, L. ;

Santos, E. ;

Scarola, V. W. ;

Schollwoeck, U. ;

Silva, C. ;

Surer, B. ;

Todo, S. ;

Trebst, S. ;

Troyer, M. ;

Wall, M. L. ;

Werner, P. ;

Wessel, S. .

JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT, 2011,

[5] Quantum critical behavior for a model magnet [J].

Bitko, D ;

Rosenbaum, TF ;

Aeppli, G .

PHYSICAL REVIEW LETTERS, 1996, 77 (05) :940-943

[6] Dynamical structure factor of the anisotropic Heisenberg chain in a transverse field -: art. no. 134431 [J].

Caux, JS ;

Essler, FHL ;

Löw, U .

PHYSICAL REVIEW B, 2003, 68 (13)

[7] Order-disorder transition in one-dimensional quantum magnet [J].

Chatterjee, I .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2003, 265 (03) :363-366

[8] Quantum Criticality in an Ising Chain: Experimental Evidence for Emergent E8 Symmetry [J].

Coldea, R. ;

Tennant, D. A. ;

Wheeler, E. M. ;

Wawrzynska, E. ;

Prabhakaran, D. ;

Telling, M. ;

Habicht, K. ;

Smeibidl, P. ;

Kiefer, K. .

SCIENCE, 2010, 327 (5962) :177-180

[9] One-dimensional anisotropic Heisenberg model in the transverse magnetic field [J].

Dmitriev, DV ;

Krivnov, VY ;

Ovchinnikov, AA ;

Langari, A .

JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS, 2002, 95 (03) :538-549

[10] Gap generation in the XXZ model in a transverse magnetic field -: art. no. 172409 [J].

Dmitriev, DV ;

Krivnov, VY ;

Ovchinnikov, AA .

PHYSICAL REVIEW B, 2002, 65 (17)