Multispinon Continua at Zero and Finite Temperature in a Near-Ideal Heisenberg Chain

B. Lake, D. A. Tennant, J.-S. Caux, T. Barthel, U. Schollwöck, S. E. Nagler, and C. D. Frost
Phys. Rev. Lett. 111, 137205 – Published 26 September 2013
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Abstract

The space-and time-dependent response of many-body quantum systems is the most informative aspect of their emergent behavior. The dynamical structure factor, experimentally measurable using neutron scattering, can map this response in wave vector and energy with great detail, allowing theories to be quantitatively tested to high accuracy. Here, we present a comparison between neutron scattering measurements on the one-dimensional spin-1/2 Heisenberg antiferromagnet KCuF3, and recent state-of-the-art theoretical methods based on integrability and density matrix renormalization group simulations. The unprecedented quantitative agreement shows that precise descriptions of strongly correlated states at all distance, time, and temperature scales are now possible, and highlights the need to apply these novel techniques to other problems in low-dimensional magnetism.

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  • Received 22 April 2013

DOI:https://doi.org/10.1103/PhysRevLett.111.137205

© 2013 American Physical Society

Authors & Affiliations

B. Lake1,2,*, D. A. Tennant1,2, J.-S. Caux3, T. Barthel4, U. Schollwöck4, S. E. Nagler5, and C. D. Frost6

  • 1Helmholtz-Zentrum Berlin, Hahn-Meitner Platz 1, D-14109 Berlin, Germany
  • 2Institut für Festkörperphysik, Technische Universität Berlin, Hardenbergstraße 36, 10623 Berlin, Germany
  • 3Institute for Theoretical Physics, Universiteit van Amsterdam, Science Park 904, Amsterdam, The Netherlands
  • 4Department of Physics and Arnold Sommerfeld Center for Theoretical Physics, Ludwig-Maximilians-Universität München, Theresienstraße 37, 80333 Munich, Germany
  • 5Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6475, USA
  • 6ISIS Facility, Rutherford Appleton Laboratory, Chilton OX11 0QX, United Kingdom

  • *Corresponding author. bella.lake@helmholtz-berlin.de

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Issue

Vol. 111, Iss. 13 — 27 September 2013

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