Confinement-deconfinement interplay in quantum phases of doped Mott insulators

Details Confinement-deconfinement interplay in quantum phases of doped Mott insulators Confinement-deconfinement interplay in quantum phases of doped Mott insulators

2010-07-15

arxiv.org/abs/1007.2507v2

PRL 106, 147002 (2011)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 1 figure, accepted by Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.106.147002

It is generally accepted that doped Mott insulators can be well characterized by the t-J model. In the t-J model, the electron fractionalization is dictated by the phase string effect. We found that in the underdoped regime, the antiferromagnetic and superconducting phases are dual: in the former, holons are confined while spinons are deconfined, and {\it vice versa} in the latter. These two phases are separated by a novel phase, the so-called Bose-insulating phase, where both holons and spinons are deconfined. A pair of Wilson loops was found to constitute a complete set of order parameters determining this zero-temperature phase diagram. The quantum phase transitions between these phases are suggested to be of non-Landau-Ginzburg-Wilson type.

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