We derive a 2+1 dimensional model with unconventional supersymmetry at the boundary of an AdS_4 N-extended supergravity, generalizing previous results. The (unconventional) extended supersymmetry of the boundary model is instrumental in describing, within a top-down approach, the electronic properties of graphene-like 2D materials at the two Dirac points K and K'. The two valleys correspond to the two independent sectors of the OSp(p|2)xOSp(q|2) boundary model in the p=q case, which are related by a parity transformation. The Semenoff and Haldane-type masses entering the corresponding Dirac equations are identified with the torsion parameters of the substrate in the model.
N-extended D=4 supergravity, unconventional SUSY and graphene / Andrianopoli, L.; Cerchiai, B. L.; D’Auria, R.; Gallerati, A.; Noris, R.; Trigiante, M.; Zanelli, J.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2020:1(2020).
Titolo: | N-extended D=4 supergravity, unconventional SUSY and graphene |
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Data di pubblicazione: | 2020 |
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Digital Object Identifier (DOI): | http://dx.doi.org/10.1007/JHEP01(2020)084 |
Appare nelle tipologie: | 1.1 Articolo in rivista |
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http://hdl.handle.net/11583/2784472