Magnetic Catalysis in Graphene Effective Field Theory
| Autor: | Savvas Zafeiropoulos, Christopher Winterowd, Carleton DeTar |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Chiral anomaly
Physics Chiral perturbation theory Strongly Correlated Electrons (cond-mat.str-el) 010308 nuclear & particles physics Magnetic catalysis High Energy Physics::Lattice Spontaneous symmetry breaking High Energy Physics - Lattice (hep-lat) High Energy Physics::Phenomenology Lattice field theory FOS: Physical sciences General Physics and Astronomy 01 natural sciences Condensed Matter - Strongly Correlated Electrons symbols.namesake High Energy Physics - Lattice Dirac fermion Quantum electrodynamics Nambu–Jona-Lasinio model Quantum mechanics 0103 physical sciences symbols 010306 general physics Chiral symmetry breaking |
| Zdroj: | Physical Review Letters. 117 |
| ISSN: | 1079-7114 0031-9007 |
| DOI: | 10.1103/physrevlett.117.266802 |
| Popis: | We report on the first observation of magnetic catalysis at zero temperature in a fully nonperturbative simulation of the graphene effective field theory. Using lattice gauge theory, a nonperturbative analysis of the theory of strongly-interacting, massless, (2+1)-dimensional Dirac fermions in the presence of an external magnetic field is performed. We show that in the zero-temperature limit, a nonzero value for the chiral condensate is obtained which signals the spontaneous breaking of chiral symmetry. This result implies a nonzero value for the dynamical mass of the Dirac quasiparticle. This in turn has been posited to account for the quantum-Hall plateaus that are observed at large magnetic fields. 5 pages, 6 figures |
| Databáze: | OpenAIRE |
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