Half-integer anomalous currents in 2D materials from a QFT viewpoint
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1038/s41598-022-09483-4 http://hdl.handle.net/11449/230657 |
Resumo: | Charge carriers in Dirac/Weyl semi-metals exhibit a relativistic-like behavior. In this work we propose a novel type of intrinsic half-integer Quantum Hall effect in 2D materials, thereby also offering a topological protection mechanism for the current. Its existence is rooted in the 2D parity anomaly, without any need for a perpendicular magnetic field. We conjecture that it may occur in disturbed honeycomb lattices where both spin degeneracy and time reversal symmetry are broken. These configurations harbor two distinct gap-opening mechanisms that, when occurring simultaneously, drive slightly different gaps in each valley, causing a net anomalous conductivity when the chemical potential is tuned to be between the distinct gaps. Some examples of promising material setups that fulfill the prerequisites of our proposal are also listed to motivate looking for the effect at the numerical and experimental level. |
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Repositório Institucional da UNESP |
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Half-integer anomalous currents in 2D materials from a QFT viewpointCharge carriers in Dirac/Weyl semi-metals exhibit a relativistic-like behavior. In this work we propose a novel type of intrinsic half-integer Quantum Hall effect in 2D materials, thereby also offering a topological protection mechanism for the current. Its existence is rooted in the 2D parity anomaly, without any need for a perpendicular magnetic field. We conjecture that it may occur in disturbed honeycomb lattices where both spin degeneracy and time reversal symmetry are broken. These configurations harbor two distinct gap-opening mechanisms that, when occurring simultaneously, drive slightly different gaps in each valley, causing a net anomalous conductivity when the chemical potential is tuned to be between the distinct gaps. Some examples of promising material setups that fulfill the prerequisites of our proposal are also listed to motivate looking for the effect at the numerical and experimental level.Department of Physics KU Leuven Campus Kortrijk-Kulak, Etienne Sabbelaan 53 bus 7657Department of Physics and Astronomy Ghent University, Krijgslaan 281-S9Instituto de Física “Gleb Wataghin” Universidade Estadual de Campinas, Rua Sérgio Buarque de Holanda, 777, SPCentro de Ciencias Exactas Universidad del Bio-Bio, Avda. Andrés Bello 720, Casilla 447Instituto de Física Teórica Universidade Estadual Paulista, Rua Dr. Bento Teobaldo Ferraz, 271-Bloco II, SPDepartamento de Ciencias Básicas Facultad de Ciencias Universidad del Bio-Bio, Avda. Andrés Bello 720, Casilla 447Instituto de Física Teórica Universidade Estadual Paulista, Rua Dr. Bento Teobaldo Ferraz, 271-Bloco II, SPKU Leuven Campus Kortrijk-KulakGhent UniversityUniversidade Estadual de Campinas (UNICAMP)Universidad del Bio-BioUniversidade Estadual Paulista (UNESP)Dudal, DavidMatusalem, FilipeMizher, Ana Júlia [UNESP]Rocha, Alexandre Reily [UNESP]Villavicencio, Cristian2022-04-29T08:41:24Z2022-04-29T08:41:24Z2022-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1038/s41598-022-09483-4Scientific Reports, v. 12, n. 1, 2022.2045-2322http://hdl.handle.net/11449/23065710.1038/s41598-022-09483-42-s2.0-85127376080Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengScientific Reportsinfo:eu-repo/semantics/openAccess2022-04-29T08:41:24Zoai:repositorio.unesp.br:11449/230657Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T15:41:48.389612Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Half-integer anomalous currents in 2D materials from a QFT viewpoint |
title |
Half-integer anomalous currents in 2D materials from a QFT viewpoint |
spellingShingle |
Half-integer anomalous currents in 2D materials from a QFT viewpoint Dudal, David |
title_short |
Half-integer anomalous currents in 2D materials from a QFT viewpoint |
title_full |
Half-integer anomalous currents in 2D materials from a QFT viewpoint |
title_fullStr |
Half-integer anomalous currents in 2D materials from a QFT viewpoint |
title_full_unstemmed |
Half-integer anomalous currents in 2D materials from a QFT viewpoint |
title_sort |
Half-integer anomalous currents in 2D materials from a QFT viewpoint |
author |
Dudal, David |
author_facet |
Dudal, David Matusalem, Filipe Mizher, Ana Júlia [UNESP] Rocha, Alexandre Reily [UNESP] Villavicencio, Cristian |
author_role |
author |
author2 |
Matusalem, Filipe Mizher, Ana Júlia [UNESP] Rocha, Alexandre Reily [UNESP] Villavicencio, Cristian |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
KU Leuven Campus Kortrijk-Kulak Ghent University Universidade Estadual de Campinas (UNICAMP) Universidad del Bio-Bio Universidade Estadual Paulista (UNESP) |
dc.contributor.author.fl_str_mv |
Dudal, David Matusalem, Filipe Mizher, Ana Júlia [UNESP] Rocha, Alexandre Reily [UNESP] Villavicencio, Cristian |
description |
Charge carriers in Dirac/Weyl semi-metals exhibit a relativistic-like behavior. In this work we propose a novel type of intrinsic half-integer Quantum Hall effect in 2D materials, thereby also offering a topological protection mechanism for the current. Its existence is rooted in the 2D parity anomaly, without any need for a perpendicular magnetic field. We conjecture that it may occur in disturbed honeycomb lattices where both spin degeneracy and time reversal symmetry are broken. These configurations harbor two distinct gap-opening mechanisms that, when occurring simultaneously, drive slightly different gaps in each valley, causing a net anomalous conductivity when the chemical potential is tuned to be between the distinct gaps. Some examples of promising material setups that fulfill the prerequisites of our proposal are also listed to motivate looking for the effect at the numerical and experimental level. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-04-29T08:41:24Z 2022-04-29T08:41:24Z 2022-12-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1038/s41598-022-09483-4 Scientific Reports, v. 12, n. 1, 2022. 2045-2322 http://hdl.handle.net/11449/230657 10.1038/s41598-022-09483-4 2-s2.0-85127376080 |
url |
http://dx.doi.org/10.1038/s41598-022-09483-4 http://hdl.handle.net/11449/230657 |
identifier_str_mv |
Scientific Reports, v. 12, n. 1, 2022. 2045-2322 10.1038/s41598-022-09483-4 2-s2.0-85127376080 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Scientific Reports |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808128552137129984 |