2010/07/13 by Vadim M. Apalkov, Tapash Chakraborty
Materials Science · Physics and Astronomy · #Graphene research and applications #Quantum and electron transport phenomena #Topological Materials and Phenomena #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevlett.105.036801
published as Phys. Rev. Lett. 105, 036801 (2010)
openalex publication_date 2010/07/13 · arxiv created 2010/07/23 · arxiv updated 2010/07/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Here we report from our theoretical studies that, in biased bilayer graphene, one can induce phase transitions from an incompressible fractional quantum Hall state to a compressible state by tuning the band gap at a given electron density. The nature of such phase transitions is different for weak and strong interlayer coupling. Although for strong coupling more levels interact there is a lesser number of transitions than for the weak coupling case. The intriguing scenario of tunable phase transitions in the fractional quantum Hall states is unique to bilayer graphene and has never before existed in conventional semiconductor systems.