Vector chirality and inhomogeneous magnetization in frustrated spin tubes in high magnetic fields

Details Vector chirality and inhomogeneous magnetization in frustrated spin tubes in high magnetic fields Vector chirality and inhomogeneous magnetization in frustrated spin tubes in high magnetic fields

2006-11-21

arxiv.org/abs/cond-mat/0611549v3

Physical Review B 75, 014411 (2007)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 3 figures, Revtex, published version, see also cond-mat/0612165

Scientific paper

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.

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