2021/11/30 by Ajit C. Balram · 32 citations
Materials Science · Physics and Astronomy · #Bilayer graphene #Composite fermion #Condensed matter physics #Electron #Fractional quantum Hall effect #Graphene #Graphene research and applications #Landau quantization #Magnetic field #Physics #Quantum #Quantum Hall effect #Quantum and electron transport phenomena #Quantum mechanics #Quantum oscillations #Quantum spin Hall effect #Shubnikov–de Haas effect #Topological Materials and Phenomena #Topological quantum computer #Zeroth law of thermodynamics #cond-mat.mes-hall #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.105.l121406
published in Physical review. B./Physical review. B 105(12) (American Physical Society) · main text: 4 pages, 2 figures includes supplemental material (published version)
openalex created_date 2021/11/22 · arxiv created 2022/03/14 · openalex publication_date 2022/03/14 · arxiv updated 2022/03/15 · openalex updated_date 2026/08/05
The electron-electron interaction in the Landau levels of bilayer graphene is markedly different from that of conventional semiconductors such as GaAs. We show that in the zeroth Landau level of bilayer graphene, in the orbital which is dominated by the non-relativistic second Landau level wave function, by tuning the magnetic field a topological quantum phase transition from an Abelian composite fermion to a non-Abelian parton fractional quantum Hall state can be induced at filling factors 1/2, ~2/5 and 3/7. The parton states host exotic anyons that can potentially be utilized to store and process quantum information. Intriguingly, some of these transitions may have been observed in a recent experiment [Huang et al. arXiv:2105.07058].