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  Field theoretical study of a spin-1/2 ladder with unequal chain exchanges

Sarkar, S., & Sen, D. (2002). Field theoretical study of a spin-1/2 ladder with unequal chain exchanges. Physical Review B, 65: 1722408. Retrieved from http://ojps.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRBMDO000065000017172408000001&idtype=cvips&gifs=yes.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-002B-38C1-6 Version Permalink: https://hdl.handle.net/11858/00-001M-0000-002B-38C2-4
Genre: Journal Article

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Sarkar, S.1, Author           
Sen, D., Author
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1Max Planck Institute for the Physics of Complex Systems, Max Planck Society, ou_2117288              

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 MPIPKS: Phase transitions and critical phenomena
 Abstract: We study the low-energy properties of a Heisenberg spin-1/2 zigzag ladder with different exchange constants on the two chains. Using a nonlinear -model field theory and Abelian bosonization, we find that the excitations are gapless, with a finite spin-wave velocity, if the values of the chain exchanges are small. If the chain exchanges are large, the system is gapped, and the energy spectra of the kink and antikink excitations are different from each other. ©2002 The American Physical Society

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Language(s): eng - English
 Dates: 2002
 Publication Status: Issued
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 Rev. Type: -
 Identifiers: eDoc: 478839
URI: http://ojps.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRBMDO000065000017172408000001&idtype=cvips&gifs=yes
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Title: Physical Review B
Source Genre: Journal
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Pages: - Volume / Issue: 65 Sequence Number: 1722408 Start / End Page: - Identifier: -