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Published on: August 2, 2019
Confinement-deconfinement interplay in quantum phases of doped Mott insulators
Peng Ye1, Chu-Shun Tian, Xiao-Liang Qi
1Institute for Advanced Study, Tsinghua University, Beijing, 100084, People's Republic of China.
Abstract:
In the t-J model, the electron fractionalization is dictated by the phase string effect. We find that in the underdoped regime, the antiferromagnetic and superconducting phases are dual: in the former, holons are confined while spinons are deconfined, and 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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The work...

