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Orbital Hall responses in disordered topological materials
Canonico, Luis M (Institut Català de Nanociència i Nanotecnologia)
Garcia, José H. (Institut Català de Nanociència i Nanotecnologia)
Roche, Stephan (Institut Català de Nanociència i Nanotecnologia)

Date: 2024
Abstract: We report an efficient numerical approach to compute the different components of the orbital Hall responses in disordered topological materials from the Berry phase theory of magnetization. The theoretical framework is based on the Chebyshev expansion of Green's functions and the off-diagonal elements of the position operator for systems under arbitrary boundary conditions. The capability of this scheme is shown by computing the orbital Hall conductivity for gapped graphene and for the Haldane model in the presence of nonperturbative disorder effects. This methodology enables realistic simulations of orbital Hall responses in highly complex models of disordered materials.
Grants: European Commission 881603
Agencia Estatal de Investigación FJC2021-047300-I
Agencia Estatal de Investigación PCI2021-122035-2A
Agencia Estatal de Investigación CEX2021-001214-S
Agencia Estatal de Investigación PID2019-106684GB-I00
Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-00997
Note: Altres ajuts: ICN2 is funded by the CERCA Programme/Generalitat de Catalunya.
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Language: Anglès
Document: Article ; recerca ; Versió acceptada per publicar
Subject: Berry's phase ; Chebyshev expansion ; Greens function ; Hall response ; Numerical approaches ; Off-diagonal elements ; Orbitals ; Phase theory ; Theoretical framework ; Topological materials
Published in: Physical review B, Vol. 110, issue 14 (October 2024) , art. L140201, ISSN 2469-9969

DOI: 10.1103/PhysRevB.110.L140201


Postprint
16 p, 2.8 MB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles

 Record created 2025-02-20, last modified 2025-04-10



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