Bosonic Halperin (441) Fractional Quantum Hall Effect at Filling Factor $\nu=2/5$
Tian-Sheng Zeng1†* , Liangdong Hu2,3† , and W. Zhu4
1 Department of Physics, School of Physical Science and Technology, Xiamen University, Xiamen 361005, China2 Zhejiang University, Hangzhou 310027, China3 School of Science, Westlake University, Hangzhou 310024, China4 Key Laboratory for Quantum Materials of Zhejiang Province, School of Science, Westlake University, Hangzhou 310024, China
Abstract ：Quantum Hall effects with multicomponent internal degrees of freedom facilitate the playground of novel emergent topological orders. Here, we explore the correlated topological phases of two-component hardcore bosons at a total filling factor $\nu=2/5$ in topological lattice models under the interplay of intracomponent and intercomponent repulsions. We give the numerical demonstration of the emergence of Halperin (441) fractional quantum Hall effect based on exact diagonalization and density-matrix renormalization group methods. We elucidate its topological features including the degeneracy of the ground state, fractionally quantized topological Chern number matrix and chiral edge modes.
收稿日期: 2021-10-06
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出版日期: 2021-12-29
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2022, Vol. 39 
