278 citations · 1.2k across the 21 of their papers we have counts for
8 papers · 1 filter
Non-Fermi Liquid Behavior of the - Model in the Strange Metal Phase: Gauge Theory Consistent with Local Constraints
Long Liang, Yue Yu, Xi Luo
In the slave particle representation with gauge symmetry, local constraints on physical states characterized by various mean field solutions belong to Dirac's second-class o…
Dynamical slave-boson mean-field study of the Mott transition in the Hubbard model in the large- limit
Sen Zhou, Long Liang, Ziqiang Wang
The Mott metal-insulator transition in the Hubbard model is studied by constructing a dynamical slave-boson mean-field theory in the limit of large lattice coordination number …
Preformed pairs in flat Bloch bands
Murad Tovmasyan, Sebastiano Peotta, Long Liang +2
In a flat Bloch band the kinetic energy is quenched and single particles cannot propagate since they are localized due to destructive interference. Whether this remains true in the…
Doublon-holon binding as origin of Mott transition and fractionalized spin liquid -- Asymptotic solution of the Hubbard model in the limit of large coordination
Sen Zhou, Long Liang, Ziqiang Wang
An analytical solution of the Mott transition is obtained for the Hubbard model on the Bethe lattice in the large coordination number () limit. The excitonic binding of doublons…
Global Phase Diagram of the Extended Kitaev-Heisenberg Model on Honeycomb Lattice
Jie Lou, Long Liang, Yue Yu +1
We study the extended Kitaev-Heisenberg (EKH) quantum spin model by adding bond-dependent off-diagonal Heisenberg term into the original KH model, which was recently proposed to de…
Collective modes in a Dirac insulator with short range interactions
Xi Luo, Yue Yu, Long Liang
We study a Haldane model with nearest neighbor interactions. We find one-dimensional like collective modes arising due to the interplay of pseudo-spin and valley degrees of freedom…
Distinct-symmetry spin liquid states and phase diagram of Kitaev-Hubbard model
Long Liang, Ziqiang Wang, Yue Yu
We report the finding of a series of symmetry distinct spin liquid (SL) states and a rich phase diagram in a half-filled honeycomb lattice Hubbard model with spin-dependent hopping…
Tuning into the Kitaev spin liquid phase:A spin model on the honeycomb lattice with two types of Heisenberg exchange couplings
Yue Yu, Long Liang, Qian Niu +1
We study a spin model on honeycomb lattice with two types of Heisenberg exchange couplings, and , where is for the conventional spin and and for rotate…