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Author Dudka, M. ♦ Fedorenko, A.A.
Source Directory of Open Access Journals (DOAJ)
Content type Text
Publisher Institute for Condensed Matter Physics
File Format HTM / HTML
Date Created 2017-03-29
Copyright Year ©2017
Language English
Subject Domain (in LCC) QC1-999
Subject Keyword Science ♦ Physics ♦ Dirac fermions ♦ Two-dimensional models ♦ Phase transitions ♦ Correlated disorder ♦ Renormalization group
Abstract We study the critical behavior of the 2D N-color Ashkin-Teller model in the presence of random bond disorder whose correlations decays with the distance r as a power-law r^{-a}. We consider the case when the spins of different colors sitting at the same site are coupled by the same bond and map this problem onto the 2D system of N/2 flavors of interacting Dirac fermions in the presence of correlated disorder. Using renormalization group we show that for N=2, a "weakly universal" scaling behavior at the continuous transition becomes universal with new critical exponents. For N>2, the first-order phase transition is rounded by the correlated disorder and turns into a continuous one.
ISSN 1607324X
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study
Learning Resource Type Article
Publisher Date 2017-03-01
e-ISSN 1607324X
Journal Condensed Matter Physics
Volume Number 20
Issue Number 1
Starting Page 13603


Source: Directory of Open Access Journals (DOAJ)