• Rapid Communication

Magnetic excitations in the S=12 antiferromagnetic-ferromagnetic chain compound BaCu2V2O8 at zero and finite temperature

E. S. Klyushina, A. C. Tiegel, B. Fauseweh, A. T. M. N. Islam, J. T. Park, B. Klemke, A. Honecker, G. S. Uhrig, S. R. Manmana, and B. Lake
Phys. Rev. B 93, 241109(R) – Published 20 June 2016
PDFHTMLExport Citation

Abstract

Unlike most quantum systems which rapidly become incoherent as temperature is raised, strong correlations persist at elevated temperatures in S=12 dimer magnets, as revealed by the unusual asymmetric line shape of their excitations at finite temperatures. Here, we quantitatively explore and parametrize the strongly correlated magnetic excitations at finite temperatures using high-resolution inelastic neutron scattering of the model compound BaCu2V2O8 which we show to be an alternating antiferromagnetic-ferromagnetic spin12 chain. Comparison to state of the art computational techniques shows excellent agreement over a wide temperature range. Our findings hence demonstrate the possibility to quantitatively predict coherent behavior at elevated temperatures in quantum magnets.

  • Figure
  • Figure
  • Figure
  • Received 19 February 2016

DOI:https://doi.org/10.1103/PhysRevB.93.241109

©2016 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

E. S. Klyushina1,2,*, A. C. Tiegel3, B. Fauseweh4, A. T. M. N. Islam1, J. T. Park5, B. Klemke1, A. Honecker6, G. S. Uhrig4, S. R. Manmana3, and B. Lake1,2

  • 1Helmholtz-Zentrum Berlin für Materialien und Energie, 14109 Berlin, Germany
  • 2Institut für Festkörperphysik, Technische Universität Berlin, 10623 Berlin, Germany
  • 3Institut für Theoretische Physik, Georg-August-Universität Göttingen, 37077 Göttingen, Germany
  • 4Lehrstuhl für Theoretische Physik I, Technische Universität Dortmund, 44221 Dortmund, Germany
  • 5Heinz Maier-Leibnitz Zentrum, TU München, 85747 Garching, Germany
  • 6Laboratoire de Physique Théorique et Modélisation, CNRS UMR 8089, Université de Cergy-Pontoise, 95302 Cergy-Pontoise Cedex, France

  • *ekaterina.klyushina@helmholtz-berlin.de

Article Text (Subscription Required)

Click to Expand

Supplemental Material (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 93, Iss. 24 — 15 June 2016

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×