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Tunable Symmetries of Integer and Fractional Quantum Hall Phases in Heterostructures with Multiple Dirac Bands

Title: Tunable Symmetries of Integer and Fractional Quantum Hall Phases in Heterostructures with Multiple Dirac Bands.
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Name(s): Stepanov, Petr, author
Barlas, Yafis, author
Espiritu, Tim, author
Che, Shi, author
Watanabe, Kenji, author
Taniguchi, Takashi, author
Smirnov, Dmitry, author
Lau, Chun Ning, author
Type of Resource: text
Genre: Text
Date Issued: 2016-08-12
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: The copresence of multiple Dirac bands in few-layer graphene leads to a rich phase diagram in the quantum Hall regime. Using transport measurements, we map the phase diagram of BN-encapsulated ABA-stacked trilayer graphene as a function charge density n, magnetic field B, and interlayer displacement field D, and observe transitions among states with different spin, valley, orbital, and parity polarizations. Such a rich pattern arises from crossings between Landau levels from different subbands, which reflect the evolving symmetries that are tunable in situ. At D = 0, we observe fractional quantum Hall (FQH) states at filling factors 2/3 and -11/3. Unlike those in bilayer graphene, these FQH states are destabilized by a small interlayer potential that hybridizes the different Dirac bands.
Identifier: FSU_libsubv1_wos_000381478800009 (IID), 10.1103/PhysRevLett.117.076807 (DOI)
Keywords: aba trilayer graphene, bilayer graphene, fermions, gap, states, suspended graphene, transport
Publication Note: The publisher’s version of record is available at http://www.dx.doi.org/10.1103/PhysRevLett.117.076807
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000381478800009
Owner Institution: FSU
Is Part Of: Physical Review Letters.
0031-9007
Issue: iss. 7, vol. 117

Choose the citation style.
Stepanov, P., Barlas, Y., Espiritu, T., Che, S., Watanabe, K., Taniguchi, T., … Lau, C. N. (2016). Tunable Symmetries of Integer and Fractional Quantum Hall Phases in Heterostructures with Multiple Dirac Bands. Physical Review Letters. Retrieved from http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000381478800009