https://doi.org/10.1140/epjp/s13360-024-04985-8
Regular Article
Hubbard interaction induced non-symmetric spin and pseudo-spin entanglement at different valleys of graphene
1
Faculty of Medicine, Paris, France
2
Paris-Saclay University, Paris, France
3
Department of Physics, Azarbaijan Shahid Madani University, 53714-161, Tabriz, Iran
4
Condensed Matter Computational Research Lab., Azarbaijan Shahid Madani University, 53714-161, Tabriz, Iran
Received:
1
October
2023
Accepted:
9
February
2024
Published online:
20
February
2024
Spin-pseudo-spin intra-particle entanglement of a graphene sheet in the presence of Rashba and Hubbard interactions has been investigated. Hubbard interaction is given by the mean-field approach where we have employed the realistic value of the Hubbard interaction strength of graphene, which has been provided by theoretical computations previously performed in this field. Results show that the Hubbard interaction with its realistic strength removes spin and pseudo-spin entanglement at one of the valleys, whereas this significantly enhances the spin and pseudospin entanglement at the other valley. Accordingly, spin and pseudospin entanglement appears to be non-symmetric between these two valleys.
Sh. Ahsani, E. Faizi and A. Phirouznia have equally contributed to this work.
A correction to this article is available online at https://doi.org/10.1140/epjp/s13360-024-05116-z.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.