Web of Science: 14 citations, Scopus: 14 citations, Google Scholar: citations,
Tunable circular dichroism and valley polarization in the modified Haldane model
Vila Tusell, Marc (Universitat Autònoma de Barcelona. Departament de Física)
Hung, Nguyen Tuan (Tohoku University (Japó). Department of Physics)
Roche, Stephan (Institut Català de Nanociència i Nanotecnologia)
Saito, Riichiro (Tohoku University (Japó). Department of Physics)

Date: 2019
Abstract: We study the polarization dependence of optical absorption for a modified Haldane model, which exhibits antichiral edge modes in the presence of sample boundaries and has been argued to be realizable in transition metal dichalcogenides or Weyl semimetals. A rich optical phase diagram is unveiled, in which the correlations between perfect circular dichroism, pseudospin andvalley polarization can be tuned independently upon varying the Fermi energy. In particular, perfect circular dichroism and valley polarization are achieved simultaneously. This combination of optical properties suggests some interesting photonic device functionality (e. g. , light polarizer) which could be combined with valleytronics applications (e. g. , generation of valley currents).
Grants: European Commission 696656
Rights: Tots els drets reservats.
Language: Anglès
Document: Article ; recerca ; Versió acceptada per publicar
Subject: Device functionality ; Haldane model ; Optical phase ; Polarization dependence ; Pseudospin ; Transition metal dichalcogenides ; Valley current
Published in: Physical review B, Vol. 99, issue 16 (April 2019) , art. 161404, ISSN 2469-9969

DOI: 10.1103/PhysRevB.99.161404


Postprint
7 p, 3.9 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 2020-02-06, last modified 2022-09-10



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