Across dimensions: Two- and three-dimensional phase transitions from the iterative renormalization-group theory of chains

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Date

2020

Authors

Keçoğlu, İbrahim
Berker, A. Nihat

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Abstract

Sharp two- and three-dimensional phase transitional magnetization curves are obtained by an iterative renormalization-group coupling of Ising chains, which are solved exactly. The chains by themselves do not have a phase transition or nonzero magnetization, but the method reflects crossover from temperaturelike to fieldlike renormalization-group flows as the mechanism for the higher-dimensional phase transitions. The magnetization of each chain acts, via the interaction constant, as a magnetic field on its neighboring chains, thus entering its renormalization-group calculation. The method is highly flexible for wide application.

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102

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3

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