EPJ Web Conf.
Volume 233, 2020Portuguese Condensed Matter Physics National Conference (CMPNC 2019)
|Number of page(s)||6|
|Section||2D Materials, Complex Systems and Statistical and Nonlinear Physics|
|Published online||16 April 2020|
Multi-orbital physics of edge-magnetism in a Hubbard model of transition-metal dichalcogenide nanoribbons: Comparing Mean Field Theory and Determinant Quantum Monte Carlo
Centro de Física das Universidades do Minho e Porto, Departamento de Física e Astronomia, Facul-dade de Ciências, Universidade do Porto, 4169-007 Porto, Portugal
Published online: 16 April 2020
We study the emergence of edge-magnetism in zigzag nanoribbons from electron-electron interactions in a minimal 3-band tight-binding descrip¬tion of transition-metal dichalcogenide monolayers with an intra-orbital Hub¬bard term. We explain the influence of each orbital in the magnetic ordering, comparing the results of Mean Field Theory and determinant Quantum Monte Carlo. We focus on a gapped edge-antiferromagnetic phase appearing at three-quarter edge-filling for realistic values of the interaction.
© The Authors, published by EDP Sciences, 2020
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