Magnetic Flux Tuning of Spin Chirality in Mott Insulators with Ring Exchanges

Details Magnetic Flux Tuning of Spin Chirality in Mott Insulators with Ring Exchanges Magnetic Flux Tuning of Spin Chirality in Mott Insulators with Ring Exchanges

2009-09-09

arxiv.org/abs/0909.1622v1

Phys. Rev. B 82, 132406 (2010)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 5 figures

Scientific paper

10.1103/PhysRevB.82.132406

A manifestation of the many-body Aharonov-Bohm effect in the magnetic-flux-tuned Mott insulators with three-spin and four-spin ring exchanges, presents as an effective tool to manipulate the ground-state spin chirality, such as, tune the magnitude continuously, switch an abrupt jump, or even reverse its sign. Such a mechanism is demonstrated explicitly in both quasi-one-dimensional ladders and two-dimensional lattices with triangles as elementary plaquettes.

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