Email this article On the Extended Holstein–Hubbard Model for Epitaxial Graphene on Metal
- Authors: Davydov S.Y.1,2
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Affiliations:
- Ioffe Institute
- St. Petersburg National Research University of Information Technologies, Mechanics, and Optics
- Issue: Vol 52, No 2 (2018)
- Pages: 226-230
- Section: Carbon Systems
- URL: https://journals.rcsi.science/1063-7826/article/view/202444
- DOI: https://doi.org/10.1134/S1063782618020033
- ID: 202444
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Abstract
A model that combines the extended Hubbard model involving intra-atomic and interatomic Coulomb repulsion and the Holstein model describing the interaction of a band electron with an Einstein phonon is proposed. Three regions of the phase diagram are considered. The regions correspond to the states of spin- and charge-density waves and the state uniform in spin and charge. Numerical estimations for the Rh, Ir, and Pt substrates show that Coulomb interaction plays a leading part, making possible transitions from the uniform state to the states of spin- and charge-density waves.
About the authors
S. Yu. Davydov
Ioffe Institute; St. Petersburg National Research University of Information Technologies, Mechanics, and Optics
Author for correspondence.
Email: Sergei_Davydov@mail.ru
Russian Federation, St. Petersburg, 194021; St. Petersburg, 197101
