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  Correlated states of a triangular net of coupled quantum wires: Implications for the phase diagram of marginally twisted bilayer graphene

Chen, C., Neto, A. H. C., & Pereira, V. M. (2020). Correlated states of a triangular net of coupled quantum wires: Implications for the phase diagram of marginally twisted bilayer graphene. Physical Review B, 101(16): 165431. doi:10.1103/PhysRevB.101.165431.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0006-984D-9 Version Permalink: https://hdl.handle.net/21.11116/0000-0008-E0A3-2
Genre: Journal Article

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 Creators:
Chen, Chuan1, Author           
Neto, A. H. Castro2, Author
Pereira, Vitor M.2, Author
Affiliations:
1Max Planck Institute for the Physics of Complex Systems, Max Planck Society, ou_2117288              
2external, ou_persistent22              

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 MPIPKS: Strongly correlated electrons
 Abstract: We explore in detail the electronic phases of a system consisting of three noncolinear arrays of coupled quantum wires, each rotated 120 degrees with respect to the next. A perturbative renormalization-group analysis reveals that multiple correlated states can be stabilized: a s-wave or d +/- id superconductor, a charge density wave insulator, a two-dimensional Fermi liquid, and a 2D Luttinger liquid (also known as smectic metal or sliding Luttinger liquid). The model provides an effective description of electronic interactions in small-angle twisted bilayer graphene and we discuss its implications in relation to the recent observation of correlated and superconducting ground states near commensurate densities in magic-angle twisted samples, as well as the "strange metal" behavior at finite temperatures as a natural outcome of the 2D Luttinger liquid phase.

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 Dates: 2020-04-272020-04-15
 Publication Status: Issued
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 Rev. Type: -
 Identifiers: ISI: 000528781000013
DOI: 10.1103/PhysRevB.101.165431
arXiv: 1907.11450
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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 101 (16) Sequence Number: 165431 Start / End Page: - Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008