278 citations · 1.2k across the 21 of their papers we have counts for
22 papers
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…
Anomalous chiral magnetic effect in time reversal symmetry breaking Weyl semimetals
Long Liang
We propose a mechanism to generate dissipationless current in time reversal symmetry breaking Weyl semimetals through the anomalous chiral magnetic effect (ACME). The ACME current…
Axial Magnetoelectric Effect in Dirac semimetals
Long Liang, P. O. Sukhachov, A. V. Balatsky
We propose a mechanism to generate a static magnetization via {\em axial magnetoelectric effect} (AMEE). Magnetization appears as…
Topological magnetotorsional effect in Weyl semimetals
Long Liang, Teemu Ojanen
In this work we introduce a thermal magnetotorsional effect (TME) as a novel topological response in magnetic Weyl semimetals. We predict that magnetization gradients perpendicular…
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 …
Curved spacetime theory of inhomogeneous Weyl materials
Long Liang, Teemu Ojanen
We show how the universal low-energy properties of Weyl semimetals with spatially varying time-reversal (TR) or inversion (I) symmetry breaking are described in terms of chiral fer…
Superfluid weight and Berezinskii-Kosterlitz-Thouless transition temperature of twisted bilayer graphene
Aleksi Julku, Teemu J. Peltonen, Long Liang +2
We study superconductivity of twisted bilayer graphene with local and non-local attractive interactions. We obtain the superfluid weight and Berezinskii-Kosterlitz-Thouless (BKT) t…
Quantum corrections to a spin-orbit coupled Bose-Einstein Condensate
Long Liang, Päivi Törmä
We study systematically the quantum corrections to a weakly interacting Bose-Einstein condensate with spin-orbit coupling. We show that quantum fluctuations, enhanced by the spin-o…
Quantum metric and effective mass of a two-body bound state in a flat band
Paivi Torma, Long Liang, Sebastiano Peotta
We consider two-body bound states in a flat band of a multiband system. The existence of pair dispersion predicts the possibility of breaking the degeneracy of the band and creatin…
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…
Superfluid weight and Berezinskii-Kosterlitz-Thouless temperature of spin-imbalanced and spin-orbit-coupled Fulde-Ferrell phases in lattice systems
Aleksi Julku, Long Liang, Päivi Törmä
We study the superfluid weight and Berezinskii-Kosterlitz-Thouless (BKT) transition temperatures in case of exotic Fulde-Ferrell (FF) superfluid states in lattice s…
Wave packet dynamics of Bogoliubov quasiparticles: quantum metric effects
Long Liang, Sebastiano Peotta, Ari Harju +1
We study the dynamics of the Bogoliubov wave packet in superconductors and calculate the supercurrent carried by the wave packet. We discover an anomalous contribution to the super…
Band geometry, Berry curvature and superfluid weight
Long Liang, Tuomas I. Vanhala, Sebastiano Peotta +3
We present a theory of the superfluid weight in multiband attractive Hubbard models within the Bardeen-Cooper-Schrieffer (BCS) mean field framework. We show how to separate the geo…
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…
Semimetal with both Rarita-Schwinger-Weyl and Weyl excitations
Long Liang, Yue Yu
A relativistic spinor with spin 3/2 is historically called Rarita-Schwinger spinor. The right- and left-handed chiral degrees of freedom for the massless Rarita-Schwinger spinor ar…
Topological phase transitions in the repulsively interacting Haldane-Hubbard model
Tuomas I. Vanhala, Topi Siro, Long Liang +3
Using dynamical mean-field theory and exact diagonalization we study the phase diagram of the repulsive Haldane-Hubbard model, varying the interaction strength and the sublattice p…
Rarita-Schwinger-Weyl semimetal in Jeff=3/2 electron systems
Long Liang, Yue Yu
We propose a relativistic Jeff=3/2 semimetal with 4d1 or 5d1 electrons on a cubic lattice when the strong spin-orbital coupling takes over the Hunds' coupling. A relativistic spino…
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…
An anyon model in a toric honeycomb lattice
Long Liang, Yue Yu
We study an anyon model in a toric honeycomb lattice. The ground states and the low-lying excitations coincide with those of Kitaev toric code model and then the excitations obey m…