Journal
PHYSICAL REVIEW LETTERS
Volume 114, Issue 16, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.114.167201
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Funding
- Helmholtz association [VI-521]
- Deutsche Akademie der Naturforscher Leopoldina [LPDS 2011-14]
- ERC [ERC-StG-Thomale-336012]
- National Science Foundation [NSF PHY11-25915]
- [DFG-FOR 960]
- [DFG-SPP 1666]
- [DFG-SFB 1143]
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We propose the pi flux triangular lattice Hubbard model (pi THM) as a prototypical setup to stabilize magnetically disordered quantum states of matter in the presence of charge fluctuations. The quantum paramagnetic domain of the pi THM that we identify for intermediate Hubbard U is framed by a Dirac semimetal for weak coupling and by 120 degrees Neel order for strong coupling. Generalizing the Klein duality from spin Hamiltonians to tight-binding models, the pi THM maps to a Hubbard model which corresponds to the (J(H); J(K)) = (-1, 2) Heisenberg-Kitaev model in its strong coupling limit. The p THM provides a promising microscopic testing ground for exotic finite-U spin liquid ground states amenable to numerical investigation.
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