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Title: Extended universal finite-T renormalization of excitations in a class of one-dimensional quantum magnets.

Abstract

Temperature dependencies of gap energies and magnon lifetimes are measured in the quasi-one-dimensional S=1/2 gapped quantum magnets (CH{sub 3}){sub 2}CHNH{sub 3}CuCL{sub 3} (IPA-CuCl{sub 3}, where IPA denotes isopropyl ammonium) and Cu{sub 2}Cl{sub 4} {center_dot} D{sub 8}C{sub 4}SO{sub 2} (Sul-Cu{sub 2}Cl{sub 4}) using inelastic neutron scattering. The results are compared to those found in literature for S=1 Haldane spin chain materials and to theoretical calculations for the O(3)- and O(N)- quantum nonlinear {delta}-models. It is found that when the T=0 energy gap {Delta} is used as the temperature scale, all experimental and theoretical curves are identical to within system-dependent but temperature-independent scaling factors of the order of unity. This quasi-universality extends over a surprising broad T range, at least up to {kappa}T {approx} 1.5{Delta}.

Authors:
 [1];  [1];  [2];  [3];  [4]
  1. ORNL
  2. CEA, Grenoble, France
  3. Kagoshima University, Kagoshima JAPAN
  4. National Institute of Standards and Technology (NIST)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
966389
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 100; Journal Issue: 15; Journal ID: ISSN 0031-9007
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ENERGY GAP; MAGNETS; MAGNONS; NEUTRONS; RENORMALIZATION; SCATTERING; SPIN

Citation Formats

Zheludev, Andrey I, Garlea, Vasile O, Regnault, L. -P., Manaka, H., and Tswelik, A. Extended universal finite-T renormalization of excitations in a class of one-dimensional quantum magnets.. United States: N. p., 2008. Web. doi:10.1103/PhysRevLett.100.157204.
Zheludev, Andrey I, Garlea, Vasile O, Regnault, L. -P., Manaka, H., & Tswelik, A. Extended universal finite-T renormalization of excitations in a class of one-dimensional quantum magnets.. United States. https://doi.org/10.1103/PhysRevLett.100.157204
Zheludev, Andrey I, Garlea, Vasile O, Regnault, L. -P., Manaka, H., and Tswelik, A. 2008. "Extended universal finite-T renormalization of excitations in a class of one-dimensional quantum magnets.". United States. https://doi.org/10.1103/PhysRevLett.100.157204.
@article{osti_966389,
title = {Extended universal finite-T renormalization of excitations in a class of one-dimensional quantum magnets.},
author = {Zheludev, Andrey I and Garlea, Vasile O and Regnault, L. -P. and Manaka, H. and Tswelik, A.},
abstractNote = {Temperature dependencies of gap energies and magnon lifetimes are measured in the quasi-one-dimensional S=1/2 gapped quantum magnets (CH{sub 3}){sub 2}CHNH{sub 3}CuCL{sub 3} (IPA-CuCl{sub 3}, where IPA denotes isopropyl ammonium) and Cu{sub 2}Cl{sub 4} {center_dot} D{sub 8}C{sub 4}SO{sub 2} (Sul-Cu{sub 2}Cl{sub 4}) using inelastic neutron scattering. The results are compared to those found in literature for S=1 Haldane spin chain materials and to theoretical calculations for the O(3)- and O(N)- quantum nonlinear {delta}-models. It is found that when the T=0 energy gap {Delta} is used as the temperature scale, all experimental and theoretical curves are identical to within system-dependent but temperature-independent scaling factors of the order of unity. This quasi-universality extends over a surprising broad T range, at least up to {kappa}T {approx} 1.5{Delta}.},
doi = {10.1103/PhysRevLett.100.157204},
url = {https://www.osti.gov/biblio/966389}, journal = {Physical Review Letters},
issn = {0031-9007},
number = 15,
volume = 100,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 2008},
month = {Tue Jan 01 00:00:00 EST 2008}
}