Quantum phase transition in a dimerized chain with hexamer distortion

Naseri, Mahboobeh Shahri and Japaridze, G.I. and Mahdavifar, Saeed and Shayesteh, Saber Farjami (2013) Quantum phase transition in a dimerized chain with hexamer distortion. Physica Status Solidi B, 250 (2). pp. 338-443.


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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.

Item Type: Article
Subjects: Q Science > QC Physics
Divisions: Faculties/Schools > School of Natural Sciences and Engineering
Depositing User: გიორგი ჯაფარიძე
Date Deposited: 29 Jan 2014 19:45
Last Modified: 03 Apr 2015 06:43
URI: http://eprints.iliauni.edu.ge/id/eprint/716

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