Longitudinal SDW order in a quasi-1D Ising-like quantum antiferromagnet

Details Longitudinal SDW order in a quasi-1D Ising-like quantum antiferromagnet Longitudinal SDW order in a quasi-1D Ising-like quantum antiferromagnet

2008-08-29

arxiv.org/abs/0808.4073v1

Physics

Condensed Matter

Strongly Correlated Electrons

4pages, 4figure

Scientific paper

10.1103/PhysRevLett.101.207201

From neutron diffraction measurements on a quasi-1D Ising-like Co$^{\rm 2+}$ spin compound BaCo$_{\rm 2}$V$_{\rm 2}$O$_{\rm 8}$, we observed an appearance of a novel type of incommensurate ordering in magnetic fields. This ordering is essentially different from the N{\' e}el-type ordering, which is expected for the classical system, and is caused by quantum fluctuation inherent in the quantum spin chain. A Tomonaga-Luttinger liquid (TLL) nature characteristic of the gapless quantum 1D system is responsible for the realization of the incommensurate ordering.

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