Spin-chain system as a tunable simulator of frustrated planar magnetism

Details Spin-chain system as a tunable simulator of frustrated planar magnetism Spin-chain system as a tunable simulator of frustrated planar magnetism

2012-02-28

arxiv.org/abs/1202.6374v1

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 4 figures, 1 page of supplemental material

Scientific paper

At low temperatures, weakly coupled spin chains develop a magnetic order that reflects the character of gapless spin fluctuations along the chains. Using nuclear magnetic resonance, we identify and characterize two ordered states in the gapless region of the antiferromagnetic, Ising-like spin-chain system BaCo2V2O8, both arising from the incommensurate fluctuations along the chains. They correspond to the columnar and ferromagnetic ordered states of the frustrated J1-J2 spin model on a square lattice, where the spins are encoded in original spin chains. As a result of field-dependent incommensurate fluctuations and frustrated interchain interaction, J1 can be tuned continuously with the magnetic field, and its value with respect to a fixed J2 selects the ordered state. Spin-chain systems can thus be used as tunable simulators of frustrated planar magnetism.

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