The low-energy physics of three-leg frustrated antiferromagnetic spin-S tubes in the vicinity of the upper critical field are studied. Utilizing the effective field theory based on the spin-wave approximation, we argue that in the intermediate-interchain-coupling regime, the ground state exhibits a vector chiral order or an inhomogeneous magnetization for the interchain (rung) direction and the low-energy excitations are described by a one-component Tomonaga-Luttinger liquid (TLL). In both chiral and inhomogeneous phases, the Z_2 parity symmetry along the rung direction is spontaneously broken. It is also predicted that a two-component TLL appears and all the symmetries are restored in the strong-rung-coupling case.
@article{arxiv.cond-mat/0611549,
title = {Vector chirality and inhomogeneous magnetization in frustrated spin tubes in high magnetic fields},
author = {Masahiro Sato and Toru Sakai},
journal= {arXiv preprint arXiv:cond-mat/0611549},
year = {2015}
}
Comments
5 pages, 3 figures, Revtex, published version, see also cond-mat/0612165