Journal ArticleDOI
Random-Field Instability of the Ordered State of Continuous Symmetry
Yoseph Imry,Shang-keng Ma +1 more
TLDR
In this article, it was shown that when the order parameter has a continuous symmetry, the ordered state is unstable against an arbitrarily weak random field in less than four dimensions and the borderline dimensionality above which mean-field-theory results hold is six.Abstract:
Phase transitions are considered in systems where the field conjugate to the order parameter is static and random. It is demonstrated that when the order parameter has a continuous symmetry, the ordered state is unstable against an arbitrarily weak random field in less than four dimensions. The borderline dimensionality above which mean-field-theory results hold is six. (auth)read more
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Tunable charge density wave in TiS3 nanoribbons
Ce Huang,Enze Zhang,Xiang Yuan,Weiyi Wang,Yanwen Liu,Cheng Zhang,Jiwei Ling,Shanshan Liu,Faxian Xiu +8 more
Journal ArticleDOI
Domain State Model for Exchange Bias
TL;DR: In this paper, Monte Carlo simulations of a system consisting of a ferromagnetic layer exchange coupled to a diluted antiferromagnetic layers described by a classical spin model show a strong dependence of the exchange bias on the degree of dilution in agreement with recent experimental observations on Co/CoO bilayers.
Journal ArticleDOI
Breakdown of Ergodicity and Self-Averaging in Polar Flocks with Quenched Disorder.
TL;DR: It is shown that spatial quenched disorder affects polar active matter in ways more complex and far reaching than heretofore believed and in particular that ergodicity is lost in the ordered phase.
Journal ArticleDOI
Nanocrystalline magnetic alloys and ceramics
Mrinal Pal,Dipankar Chakravorty +1 more
TL;DR: In this paper, a review of the physical and chemical properties of nanocrystalline magnetic systems is presented, both metallic and ceramics, both ferro-and ferrimagnetic systems show superparamagnetic behavior at room temperature.
Journal ArticleDOI
Random Field Ising Model and Parisi-Sourlas Supersymmetry I. Supersymmetric CFT
TL;DR: The second half of the Parisi-Sourlas conjecture has been examined in this article, while the first half (existence of a supersymmetric fixed point) will be examined in a companion work.
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