100 citations · 572 across the 17 of their papers we have counts for
17 papers
Identification of Magnetic Interactions and High-field Quantum Spin Liquid in -RuCl
Han Li, Hao-Kai Zhang, Jiucai Wang +6
The frustrated magnet -RuCl constitutes a fascinating quantum material platform that harbors the intriguing Kitaev physics. However, a consensus on its intricate spin intera…
Fractional and composite excitations of antiferromagnetic quantum spin trimer chains
Jun-Qing Cheng, Jun Li, Zijian Xiong +3
Using quantum Monte Carlo, exact diagonalization and perturbation theory, we study the spectrum of the antiferromagnetic Heisenberg trimer chain by varying the ratio $g=J_2…
Exact diagonalization study of the anisotropic Heisenberg model related to YbMgGaO
Muwei Wu, Dao-Xin Yao, Han-Qing Wu
Employing exact diagonalization, we systematically study the anisotropic Heisenberg model which is related to rare-earth triangular-lattice materials. We probe its full 3D phase di…
Amplitude Mode in Quantum Magnets via Dimensional Crossover
Chengkang Zhou, Zheng Yan, Han-Qing Wu +3
We investigate the amplitude (Higgs) mode associated with longitudinal fluctuations of the order parameter at the continuous spontaneous symmetry breaking phase transition. In quan…
Correlation-induced insulating topological phases at charge neutrality in twisted bilayer graphene
Yuan Da Liao, Jian Kang, Clara N. Breiø +5
Twisted bilayer graphene (TBG) provides a unique framework to elucidate the interplay between strong correlations and topological phenomena in two-dimensional systems. The existenc…
Characterizing Random-singlet State in Two-dimensional Frustrated Quantum Magnets and Implications for the Double Perovskite SrCuTeWO
Huan-Da Ren, Tian-Yu Xiong, Han-Qing Wu +2
Motivated by experimental observation of the non-magnetic phase in the compounds with frustration and disorder, we study the ground state of the spin- square-lattice Heisenber…
Spin excitation spectra of the two dimensional Heisenberg model with a checkerboard structure
Yining Xu, Zijian Xiong, Han-Qing Wu +1
We study the spin excitation spectra of the two-dimensional spin- Heisenberg model with a checkerboard structures using stochastic analytic continuation of the imaginary-time…
Randomness induced spin-liquid-like phase in the spin- triangular Heisenberg model
Han-Qing Wu, Shou-Shu Gong, D. N. Sheng
We study the effects of bond randomness in the spin- triangular Heisenberg model using exact diagonalization and density matrix renormalization group. With increasin…
Evidence for the topological order in a kagome antiferromagnet
Yuan Wei, Zili Feng, Wiebke Lohstroh +19
A Z2 quantum spin liquid hosts one of the simplest topological orders and exhibits many exotic properties due to long-range quantum entanglements. Its elementary excitations are an…
Visualizing a Bosonic Symmetry Protected Topological Phase in an Interacting Fermion Model
Han-Qing Wu, Yuan-Yao He, Yi-Zhuang You +5
Symmetry protected topological (SPT) phases in free fermion and interacting bosonic systems have been classified, but the physical phenomena of interacting fermionic SPT phases hav…
Quantum critical point of Dirac fermion mass generation without spontaneous symmetry breaking
Yuan-Yao He, Han-Qing Wu, Yi-Zhuang You +3
We study a lattice model of interacting Dirac fermions in dimension space-time with an SU(4) symmetry. While increasing interaction strength, this model undergoes a {\it co…
Diagnosis of interaction-driven topological phase via exact diagonalization
Han-Qing Wu, Yuan-Yao He, Chen Fang +2
We propose a general scheme for diagnosing interaction-driven topological phases in the weak interaction regime using exact diagonalization (ED). The scheme comprises the analysis…
Topological invariants for interacting topological insulators: II. Breakdown of the Green's function formalism
Yuan-Yao He, Han-Qing Wu, Zi Yang Meng +1
Topological phase transitions in free fermion systems can be characterized by closing of single-particle gap and change in topological invariants. However, in the presence of elect…
Topological invariants for interacting topological insulators: I. Efficient numerical evaluation scheme and implementations
Yuan-Yao He, Han-Qing Wu, Zi Yang Meng +1
The aim of this series of two papers is to discuss topological invariants for interacting topological insulators (TIs). In the first paper (I), we provide a paradigm of efficient n…
Bona fide interaction-driven topological phase transition in correlated SPT states
Yuan-Yao He, Han-Qing Wu, Yi-Zhuang You +3
It is expected that the interplay between non-trivial band topology and strong electron correlation will lead to very rich physics. Thus a controlled study of the competition betwe…
Quantum Monte Carlo study of strange correlator in interacting topological insulators
Han-Qing Wu, Yuan-Yao He, Yi-Zhuang You +3
Distinguishing the nontrivial symmetry-protected topological (SPT) phase from the trivial insulator phase in the presence of electron-electron interaction is an urgent question to…
Direct observation of fragile Mott insulators on plaquette Hubbard lattices
Han-Qing Wu, Rong-Qiang He, Zi Yang Meng +1
Employing extensive cellular dynamical mean-field theory (CDMFT) calculations with exact diagonalization impurity solver, we investigate the ground state phase diagrams and non-mag…