Low-temperature dynamical structure factor of the two-leg spin-1/2 Heisenberg ladder

被引：21

作者：

Goetze, W. D. ^{[1
]}

Karahasanovic, U. ^{[2
]}

Essler, F. H. L. ^{[1
]}

机构：

[1] Univ Oxford, Rudolf Peierls Ctr Theoret Phys, Oxford OX1 3NP, England

[2] Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland

来源：

PHYSICAL REVIEW B | 2010年 / 82卷 / 10期

基金：

英国工程与自然科学研究理事会;

关键词：

EXCITATION SPECTRUM; CHAIN; S=1/2; MODELS;

D O I：

10.1103/PhysRevB.82.104417

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We determine the dynamical structure factor of the two-leg spin-1/2 Heisenberg ladder at low temperatures in the regime of strong rung coupling. The dominant feature at zero temperature is the coherent triplon mode. We show that the line shape of this mode broadens in a nonsymmetric way at finite temperatures and that the degree of asymmetry increases with temperature. We also show that at low frequencies, a temperature-induced resonance akin to the Villain mode in the spin-1/2 Heisenberg Ising chain emerges.

引用

页数：13

共 40 条

[1] Low temperature correlation functions in integrable models: Derivation of the large distance and time asymptotics from the form factor expansion [J].

Altshuler, BL ;

Konik, RM ;

Tsvelik, AM .

NUCLEAR PHYSICS B, 2006, 739 (03) :311-327

[2] SUSCEPTIBILITY AND EXCITATION SPECTRUM OF (VO)2P2O7 IN LADDER AND DIMER-CHAIN MODELS [J].

BARNES, T ;

RIERA, J .

PHYSICAL REVIEW B, 1994, 50 (10) :6817-6822

[3] SUPERCONDUCTIVITY IN LADDERS AND COUPLED PLANES [J].

DAGOTTO, E ;

RIERA, J ;

SCALAPINO, D .

PHYSICAL REVIEW B, 1992, 45 (10) :5744-5745

[4] Universal relaxational dynamics of gapped one-dimensional models in the quantum sine-Gordon universality class [J].

Damle, K ;

Sachdev, S .

PHYSICAL REVIEW LETTERS, 2005, 95 (18)

[5] Spin dynamics and transport in gapped one-dimensional Heisenberg antiferromagnets at nonzero temperatures [J].

Damle, K ;

Sachdev, S .

PHYSICAL REVIEW B, 1998, 57 (14) :8307-8339

[6] Finite-temperature form factors in the free Majorana theory [J].

Doyon, B .

JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT, 2005, :103-147

[7] Finite-Temperature Form Factors: a Review [J].

Doyon, Benjamin .

SYMMETRY INTEGRABILITY AND GEOMETRY-METHODS AND APPLICATIONS, 2007, 3

[8] Integral equations and long-time asymptotics for finite-temperature Ising chain correlation functions [J].

Doyon, Benjamin ;

Gamsa, Adam .

JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT, 2008,

[9] Finite-temperature dynamical correlations in massive integrable quantum field theories [J].

Essler, Fabian H. L. ;

Konik, Robert M. .

JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT, 2009,

[10] Finite-temperature lineshapes in gapped quantum spin chains [J].

Essler, Fabian H. L. ;

Konik, Robert M. .

PHYSICAL REVIEW B, 2008, 78 (10)

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