Universality classes of order parameters composed of many body bound states
Abstract
This theoretical paper discusses microscopic models giving rise to special types of order in which conduction electrons are bound together with localized spins to create composite order parameters. It is shown that composite order is related to the formation of a spin liquid with gapped excitations carrying quantum numbers which are a fraction of those of electron. These spin liquids are special in the sense that their formation necessarily involves spin degrees of freedom of both the conduction and the localized electrons. A detailed description of such spin liquid states is presented with a special emphasize on a demonstration of their robustness against local perturbations preserving the Lie group symmetry and the translational invariance.
Keywords
Cite
@article{arxiv.1607.02666,
title = {Universality classes of order parameters composed of many body bound states},
author = {A. M. Tsvelik},
journal= {arXiv preprint arXiv:1607.02666},
year = {2016}
}
Comments
14 pages, 1 figure, replaced by the published version, Phys. Rev. B 94, 205141 (2016)