Spin glass induced by infinitesimal disorder in geometrically frustrated kagome lattice

M. Schmidt, F.M. Zimmer and S.G. Magalhaes

Physica A: Statistical Mechanics and its Applications, 2015, vol. 438, issue C, 416-423

Abstract: We propose a method to study the magnetic properties of a disordered Ising kagome lattice. The model considers small spin clusters with infinite-range disordered couplings and short-range ferromagnetic (FE) or antiferromagnetic interactions. The correlated cluster mean-field theory is used to obtain an effective single-cluster problem. A finite disorder intensity in FE kagome lattice introduces a cluster spin-glass (CSG) phase. Nevertheless, an infinitesimal disorder stabilizes the CSG behavior in the geometrically frustrated kagome system. Entropy, magnetic susceptibility and spin–spin correlation are used to describe the interplay between disorder and geometric frustration (GF). We find that GF plays an important role in the low-disorder CSG phase. However, the increase of disorder can rule out the effect of GF.

Keywords: Kagome lattice; Geometric frustration; Disorder; Cluster spin glass (search for similar items in EconPapers)
Date: 2015
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:438:y:2015:i:c:p:416-423

DOI: 10.1016/j.physa.2015.07.010

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