Quantum phase transition in a dimerized chain with hexamer distortion

716 8 2734 1 7876 document 2734 2013_PSS-b_250_338.pdf application/pdf 129722741a14856160643a4b511d26fc MD5 685695 2014-01-27 16:13:21 http://eprints.iliauni.edu.ge/716/1/2013_PSS-b_250_338.pdf 716 1 1 application/pdf text ge public

2013_PSS-b_250_338.pdf

2738 2 7892 document 2738 lightbox.jpg image/png 55eec9bdc8569b31ccf8492391adfa74 MD5 48055 2014-01-27 16:23:30 http://eprints.iliauni.edu.ge/716/3/lightbox.jpg 716 3 3 image/png other Thumbnails conversion from text to thumbnail_lightbox ge public

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http://eprints.org/relation/isVersionOf http://eprints.iliauni.edu.ge/id/document/2734 http://eprints.org/relation/isVolatileVersionOf http://eprints.iliauni.edu.ge/id/document/2734 http://eprints.org/relation/issmallThumbnailVersionOf http://eprints.iliauni.edu.ge/id/document/2734 archive 34 disk0/00/00/07/16 2014-01-29 19:45:58 2015-04-03 06:43:00 2014-01-29 19:45:58 article show Naseri Mahboobeh Shahri Japaridze G.I. gia_japaridze@iliauni.edu.ge Mahdavifar Saeed mahdavifar@guilan.ac.ir Shayesteh Saber Farjami Quantum phase transition in a dimerized chain with hexamer distortion pub QC fac_eng public We consider the dimerized spin-1/2 Heisenberg chain with spin hexameric distortion of the exchange pattern and study the zero-temperature phase diagram in the parameter space (J_{1}, J_{2}, J_{3}) by continuum-limit bosonization approach and the exact diagonalization method. The phase diagram is rich and has two gaped dimer phases. We obtain an estimate of the critical line separating the different gapped dimer phases by the bosonization approach. The existence of the transition line and the difference between dimer phases is checked numerically. The behavior of the energy gap and the dimer order parameter supports the exact location of the gapless line. 2013 Physica Status Solidi B 250 2 Wyley 338-443 TRUE