Dynamics of weakly coupled random antiferromagnetic quantum spin chains

Yusuf, E. and Yang, K. (2005) Dynamics of weakly coupled random antiferromagnetic quantum spin chains. Physical Review B, 72 2: 020403-1-020403-4. doi:10.1103/PhysRevB.72.020403

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Author Yusuf, E.
Yang, K.
Title Dynamics of weakly coupled random antiferromagnetic quantum spin chains
Journal name Physical Review B   Check publisher's open access policy
ISSN 1098-0121
Publication date 2005-07-01
Year available 2005
Sub-type Article (original research)
DOI 10.1103/PhysRevB.72.020403
Open Access Status File (Publisher version)
Volume 72
Issue 2
Start page 020403-1
End page 020403-4
Total pages 4
Place of publication College Pk
Publisher American Physical Society
Language eng
Subject 240000 Physical Sciences
Abstract We study the low-energy collective excitations and dynamical response functions of weakly coupled random antiferromagnetic spin-1/2 chains. The interchain coupling leads to Neel order at low temperatures. We use the real-space renormalization-group technique to tackle the intrachain couplings and treat the interchain couplings within the random phase approximation (RPA). We show that the system supports collective spin wave excitations, and calculate the spin wave velocity and spectra weight within RPA. Comparisons will be made with inelastic neutron scattering experiments on quasi-one-dimensional disordered spin systems such as doped CuGeO3.
Keyword Physics, Condensed Matter
Si-doped Cugeo3
Long-range Order
Peierls Systems
Neel State
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Physical Sciences Publications
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Citation counts: TR Web of Science Citation Count  Cited 0 times in Thomson Reuters Web of Science Article
Scopus Citation Count Cited 2 times in Scopus Article | Citations
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Created: Fri, 28 Mar 2008, 15:30:27 EST