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Critical dynamics of singlet and triplet excitations in strongly frustrated spin systems

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Abstract

Full text: New data for the two-dimensional J{sub 1}-J{sub 2}-model shows that the Critical points for singlet and triplet excitations near J{sub 2}/J{sub 1} < 0.38 are very close together, or coincident. We propose that this is a more general result: in strongly frustrated spin systems the critical dynamics of singlet and triplet excitations are closely related. An effective field theory for such a critical point, or points, is developed, and its implications discussed. The analysis suggests the existence of gapless or almost gapless singlet excitations in the magnetically disordered phase.
Authors:
Sushkov, O P; Oitmaa, J; Zheng, W [1] 
  1. University of New South Wales, Sydney, NSW (Australia). School of Physics
Publication Date:
Jul 01, 2002
Product Type:
Conference
Resource Relation:
Conference: 15. Biennial Congress of the Australian Institute of Physics. Physics and industry working together, Sydney, NSW (Australia), 8-11 Jul 2002; Other Information: PBD: 2002; Related Information: In: 15th Biennial Congress of the Australian Institute of Physics incorporating Australian Conference of Optical Fibre Technology (ACOFT) and Australian Optical Society (AOS). Handbook and abstracts, 235 pages.
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COLLECTIVE EXCITATIONS; CRITICAL TEMPERATURE; FIELD THEORIES; HEISENBERG MODEL; SPIN; TRIPLETS; TWO-DIMENSIONAL CALCULATIONS
OSTI ID:
20619938
Research Organizations:
Australian Institute of Physics (Australia)
Country of Origin:
Australia
Language:
English
Other Identifying Numbers:
TRN: AU0524616063588
Availability:
Available in abstract form only, full text entered in this record
Submitting Site:
INIS
Size:
page(s) 216
Announcement Date:
Aug 28, 2005

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Citation Formats

Sushkov, O P, Oitmaa, J, and Zheng, W. Critical dynamics of singlet and triplet excitations in strongly frustrated spin systems. Australia: N. p., 2002. Web.
Sushkov, O P, Oitmaa, J, &amp; Zheng, W. Critical dynamics of singlet and triplet excitations in strongly frustrated spin systems. Australia.
Sushkov, O P, Oitmaa, J, and Zheng, W. 2002. "Critical dynamics of singlet and triplet excitations in strongly frustrated spin systems." Australia.
@misc{etde_20619938,
title = {Critical dynamics of singlet and triplet excitations in strongly frustrated spin systems}
 author = {Sushkov, O P, Oitmaa, J, and Zheng, W}
 abstractNote = {Full text: New data for the two-dimensional J{sub 1}-J{sub 2}-model shows that the Critical points for singlet and triplet excitations near J{sub 2}/J{sub 1} < 0.38 are very close together, or coincident. We propose that this is a more general result: in strongly frustrated spin systems the critical dynamics of singlet and triplet excitations are closely related. An effective field theory for such a critical point, or points, is developed, and its implications discussed. The analysis suggests the existence of gapless or almost gapless singlet excitations in the magnetically disordered phase.}
 place = {Australia}
 year = {2002}
 month = {Jul}
 }