Torres, Emilio, Weber, Lukas ORCID: 0000-0003-4949-5529, Janssen, Lukas ORCID: 0000-0003-4919-796X, Wessel, Stefan and Scherer, Michael M. (2020). Emergent symmetries and coexisting orders in Dirac fermion systems. Phys. Rev. Res., 2 (2). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2643-1564
Full text not available from this repository.Abstract
We consider interacting (2+1)-dimensional Dirac fermions with competing symmetry-breaking electronic instabilities, as described by relativistic quantum field theories of the Gross-Neveu-Yukawa flavor with anti-commuting mass terms. We demonstrate, using a combination of nonperturbative field-theoretical analysis and an adapted quantum Monte Carlo approach, that such systems exhibit a strong-coupling quantum multicritical fixed point with an emerging enhanced symmetry. Moreover, an extended phase coexistence regime expands out from this high-symmetry point. Our results disagree with recent results on the presence of a deconfined quantum criticality in (2+1)-dimensional Dirac fermions for the particular case of O(3) Neel and Z(2) Kekule symmetry-breaking instabilities on the graphene lattice. The robustness of these phenomena with respect to the microscopic symmetries furthermore demonstrates their relevance for a wide range of Dirac materials of current interest, from both theory and ongoing experiments.
Item Type: | Journal Article | ||||||||||||||||||||||||
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URN: | urn:nbn:de:hbz:38-337334 | ||||||||||||||||||||||||
DOI: | 10.1103/PhysRevResearch.2.022005 | ||||||||||||||||||||||||
Journal or Publication Title: | Phys. Rev. Res. | ||||||||||||||||||||||||
Volume: | 2 | ||||||||||||||||||||||||
Number: | 2 | ||||||||||||||||||||||||
Date: | 2020 | ||||||||||||||||||||||||
Publisher: | AMER PHYSICAL SOC | ||||||||||||||||||||||||
Place of Publication: | COLLEGE PK | ||||||||||||||||||||||||
ISSN: | 2643-1564 | ||||||||||||||||||||||||
Language: | English | ||||||||||||||||||||||||
Faculty: | Unspecified | ||||||||||||||||||||||||
Divisions: | Unspecified | ||||||||||||||||||||||||
Subjects: | no entry | ||||||||||||||||||||||||
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URI: | http://kups.ub.uni-koeln.de/id/eprint/33733 |
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