Surprises in O(N) Models: Nonperturbative Fixed Points, Large N Limits, and Multicriticality

Autor:	Bertrand Delamotte, Shunsuke Yabunaka
Rok vydání:	2017
Předmět:	Combinatorics Physics 010308 nuclear & particles physics 0103 physical sciences Structure (category theory) General Physics and Astronomy Fixed point 010306 general physics 01 natural sciences
Zdroj:	Physical Review Letters. 119
ISSN:	1079-7114 0031-9007
DOI:	10.1103/physrevlett.119.191602
Popis:	We find that the multicritical fixed point structure of the O(N) models is much more complicated than widely believed. In particular, we find new nonperturbative fixed points in three dimensions (d=3) as well as at N=∞. These fixed points come together with an intricate double-valued structure when they are considered as functions of d and N. Many features found for the O(N) models are shared by the O(N)⊗O(2) models relevant to frustrated magnetic systems.
Databáze:	OpenAIRE
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