Spin glass behavior upon diluting frustrated magnets and spin liquids : a Bethe-Peierls treatment

Content Provider	Semantic Scholar
Author	Mélin, Régis Peysson, Stéphane
Copyright Year	1999
Abstract	A Bethe-Peierls treatment to dilution in short range frustrated magnets and spin liquids is given. The ferromagnetic bonds of a Cayley tree are diluted and a next nearest neighbor antiferromagnetic coupling is added by completing the triangles in a Husimi cactus fashion. A spin glass phase is present at low temperatures and close to the percolation point as soon as frustration is switched on in the dilute magnet model. The phase diagram is similar to the experimental phase diagram of dilute compounds. The shape of the spin glass / ferromagnet phase boundary is not constraint by the existence of a Nishimori line. In the dilute magnet model, the spin glass phase is reentrant inside the ferromagnetic phase. An extension of the model is given, in which the spin glass / ferromagnet phase boundary is shown not to reenter inside the ferromagnetic phase asymptotically close to the tricritical point whereas it has a turning point at lower temperatures. We increase frustration to study the effect of dilution in a spin liquid state, which results in a spin glass phase originating from ordering by disorder.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://arxiv.org/pdf/cond-mat/9904432v1.pdf
Alternate Webpage(s)	http://arxiv.org/pdf/cond-mat/9904432v2.pdf
Language	English
Access Restriction	Open
Subject Keyword	Antiferromagnetism Bethe lattice Bethe–Salpeter equation Cactaceae Cactus Framework Cold Temperature Frustration Liquid substance Magma Magnet Percolation Phase diagram Quantum spin liquid Reentrancy (computing) Single Linkage Cluster Analysis Tree structure
Content Type	Text
Resource Type	Article