934 8 4017 1 11148 document 4017 2012_BGNAS_v6_N2_53-61.pdf application/pdf e918d866932292ed934110b777de97b3 MD5 474464 2014-02-08 15:16:07 http://eprints.iliauni.edu.ge/934/1/2012_BGNAS_v6_N2_53-61.pdf 934 1 1 application/pdf text ge public

2012_BGNAS_v6_N2_53-61.pdf

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http://eprints.org/relation/isVersionOf http://eprints.iliauni.edu.ge/id/document/4017 http://eprints.org/relation/isVolatileVersionOf http://eprints.iliauni.edu.ge/id/document/4017 http://eprints.org/relation/islightboxThumbnailVersionOf http://eprints.iliauni.edu.ge/id/document/4017 4021 2 11158 document 4021 preview.jpg image/png 8755e68e9acd61cabb7d19d67e4ded1b MD5 16872 2014-02-08 15:26:19 http://eprints.iliauni.edu.ge/934/4/preview.jpg 934 4 4 image/png other Thumbnails conversion from text to thumbnail_preview ge public

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http://eprints.org/relation/isVersionOf http://eprints.iliauni.edu.ge/id/document/4017 http://eprints.org/relation/isVolatileVersionOf http://eprints.iliauni.edu.ge/id/document/4017 http://eprints.org/relation/ispreviewThumbnailVersionOf http://eprints.iliauni.edu.ge/id/document/4017 4022 2 11159 document 4022 medium.jpg image/png 82aebc2465ed302830185d09294c263b MD5 5950 2014-02-08 15:26:21 http://eprints.iliauni.edu.ge/934/5/medium.jpg 934 5 5 image/png other Thumbnails conversion from text to thumbnail_medium ge public

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http://eprints.org/relation/isVersionOf http://eprints.iliauni.edu.ge/id/document/4017 http://eprints.org/relation/isVolatileVersionOf http://eprints.iliauni.edu.ge/id/document/4017 http://eprints.org/relation/ismediumThumbnailVersionOf http://eprints.iliauni.edu.ge/id/document/4017 4023 2 11160 document 4023 small.jpg image/png c831563b34cba83b769a857e00347820 MD5 1766 2014-02-08 15:26:22 http://eprints.iliauni.edu.ge/934/6/small.jpg 934 6 6 image/png other Thumbnails conversion from text to thumbnail_small ge public

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http://eprints.org/relation/isVersionOf http://eprints.iliauni.edu.ge/id/document/4017 http://eprints.org/relation/isVolatileVersionOf http://eprints.iliauni.edu.ge/id/document/4017 http://eprints.org/relation/issmallThumbnailVersionOf http://eprints.iliauni.edu.ge/id/document/4017 archive 34 disk0/00/00/09/34 2014-02-09 11:56:58 2016-06-30 12:32:09 2014-02-09 11:56:58 article show Avalishvili N Japaridze G.I. gia_japaridze@iliauni.edu.ge Nozadze D Mahdavifar S pub QC fac_eng public The ground-state magnetic phase diagram of a two-leg spin ladder with trimerized modulated rung exchange is studied using the continuum-limit bosonization approach. In the limit where the rung exchange is dominant, the model is mapped onto the effective quantum sine-Gordon model with topological term. Six quantum phase transitions at different critical magnetic fields are identified. We have shown that the magnetization curve of the system exhibits two plateaus at magnetization equal to the 1/3 and 2/3 of the saturation value. The width of the plateaus, is proportional to the excitation gap at given magnetization and scales as , where is the amplitude of rung-exchange modulation and the critical exponent is obtained as in the case of a ladder with antiferromagnetic legs and in the case of ladder with ferromagnetic legs. 2012 submitted Bulletin of the Georgian National Academy of Sciences 6 2 საქართველოს მეცნიერებათა ეროვნული აკადემია 53-60 TRUE 0132-1447