| Download | - Will be available here on August 10, 2024
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| DOI | Resolve DOI: https://doi.org/10.1021/acs.nanolett.3c02073 |
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| Author | Search for: Korkusinski, Marek1ORCID identifier: https://orcid.org/0000-0002-2238-336X; Search for: Saleem, YasserORCID identifier: https://orcid.org/0000-0002-9061-6110; Search for: Dusko, Amintor; Search for: Miravet, Daniel; Search for: Hawrylak, Pawel |
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| Affiliation | - National Research Council of Canada. Security and Disruptive Technologies
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| Funder | Search for: National Research Council Canada; Search for: University of Ottawa; Search for: Natural Sciences and Engineering Research Council of Canada |
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| Format | Text, Article |
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| Subject | bilayer graphene; gated quantum dot; atomistic tight-binding model; configuration interaction approach; phase diagram |
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| Abstract | We predict the existence of spontaneous spin and valley symmetry-broken states of interacting massive Dirac Fermions in a gated bilayer graphene quantum dot based on the exact diagonalization of the many-body Hamiltonian. The dot is defined by a vertical electric field and lateral gates, and its single-particle (SP) energies, wave functions, and Coulomb matrix elements are computed by using the atomistic tight-binding model. The effect of the Coulomb interaction is measured by the ratio of Coulomb elements to the SP level spacing. As we increase the interaction strength, we find the electrons in a series of spin and valley symmetry-broken phases with increasing valley and spin polarizations. The phase transitions result from the competition of the SP, exchange, and correlation energy scales. A phase diagram for N = 1–6 electrons is mapped out as a function of the Coulomb interaction strength. |
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| Publication date | 2023-08-10 |
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| Publisher | American Chemical Society |
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| Licence | |
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| Language | English |
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| Peer reviewed | Yes |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 58651d2d-b055-406f-87c9-7350bfda57c0 |
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| Record created | 2023-12-08 |
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| Record modified | 2023-12-11 |
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