Temperature-Dependent Spatial Oscillations in the Correlations of the XXZ Spin Chain

Journal Article · Tue Jun 01 00:00:00 EDT 1999 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.82.5365· OSTI ID:700979

Fabricius, K ^[1]; Kluemper, A ^[2]; McCoy, B M ^[3]

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1. Physics Department, University of Wuppertal, 42097 Wuppertal (Germany)
2. Institut fuer Theoretische Physik, Universitaet zu Koeln, Zuelpicher Strasse 77, 50937 Koeln 41 (Germany)
3. Institute for Theoretical Physics, State University of New York, Stony Brook, New York 11794-3840 (United States)

We study the correlation {l_angle}{sigma}{sup z}{sub 0}{sigma}{sup z}{sub n}{r_angle} for the XXZ chain in the massless attractive (ferromagnetic) region at positive temperatures by means of a numerical study of the quantum transfer matrix. We find that there is a range of temperature where the behavior of the correlation for large separations is oscillatory with an incommensurate period which depends on temperature. {copyright} {ital 1999} {ital The American Physical Society}

• OSTI ID: 700979
• Journal Information: Physical Review Letters, Vol. 82, Issue 26; Other Information: PBD: Jun 1999
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CORRELATION FUNCTIONS
TEMPERATURE DEPENDENCE
TRANSFER MATRIX METHOD
FERROMAGNETISM
EIGENVALUES
OSCILLATIONS
CHAINS
SPIN
QUANTUM MECHANICS