Phase transition observation in Weyl semimetal candidate Mn3Ga epitaxial thin films evidenced by transverse magnetoresistance

Hexagonal antiferromagnetic D019-Mn3X (X = Sn, Ge, Ga) compounds, with a non-collinear kagome spinstructure, exhibit novel topological transport properties such as colossal longitudinal magnetoresistance and itsevolution proportional to the E·B product. Here, we report on non-vanishing transverse ma...

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Autores: Cota-Martínez , Isis M, Garay-Tapia , Andrés M, Medina-Vázquez , José A, Santillán-Rodríguez , Carlos R, Saénz-Hernández , Renee J, Gutiérrez-Pérez , Rm, Holguín Momaca, José Trinidad, Ross , Caroline A, Olive-Méndez , Sion Federico, López Antón, Ricardo
Tipo de recurso: artículo
Fecha de publicación:2026
País:España
Institución:Universidad de Castilla-La Mancha
Repositorio:RUIdeRA. Repositorio Institucional de la UCLM
OAI Identifier:oai:ruidera.uclm.es:10578/47949
Acceso en línea:https://hdl.handle.net/10578/47949
Access Level:acceso abierto
Palabra clave:Mn3Ga
Phase transitions
Spin structures
Tight-binding models
Transverse magnetoresistances
Weyl semimetal
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spelling Phase transition observation in Weyl semimetal candidate Mn3Ga epitaxial thin films evidenced by transverse magnetoresistanceCota-Martínez , Isis MGaray-Tapia , Andrés MMedina-Vázquez , José ASantillán-Rodríguez , Carlos RSaénz-Hernández , Renee JGutiérrez-Pérez , RmHolguín Momaca, José TrinidadRoss , Caroline AOlive-Méndez , Sion FedericoLópez Antón, RicardoMn3GaPhase transitionsSpin structuresTight-binding modelsTransverse magnetoresistancesWeyl semimetalHexagonal antiferromagnetic D019-Mn3X (X = Sn, Ge, Ga) compounds, with a non-collinear kagome spinstructure, exhibit novel topological transport properties such as colossal longitudinal magnetoresistance and itsevolution proportional to the E·B product. Here, we report on non-vanishing transverse magnetoresistance ofstrained epitaxial GaN (0001)/Mn3Ga films with the magnetic field in the out-of-plane direction and the electricfield in the film plane along two perpendicular directions. Strain induces pseudo-electromagnetic fields favoringa chiral anomaly and therefore the observation of magnetoresistance. We found an evolution from negativelinear to positive quadratic magnetoresistance dependence on the magnetic field in the temperature range from150 to 300 K, along with a metallic to a narrow band gap semiconductor transition at a temperature of 230 K.First-principles calculations confirmed this transition, proposing a spin structure evolution, and by the implementationof a tight-binding model, based on the Fu-Kane-Mele model, the topological transport properties wereanalyzed confirming the experimental findings.Elsevier202620262026info:eu-repo/semantics/articleapplication/pdfapplication/pdfhttps://hdl.handle.net/10578/47949reponame:RUIdeRA. Repositorio Institucional de la UCLMinstname:Universidad de Castilla-La ManchaInglésinfo:eu-repo/semantics/openAccessoai:ruidera.uclm.es:10578/479492026-05-27T07:36:41Z
dc.title.none.fl_str_mv Phase transition observation in Weyl semimetal candidate Mn3Ga epitaxial thin films evidenced by transverse magnetoresistance
title Phase transition observation in Weyl semimetal candidate Mn3Ga epitaxial thin films evidenced by transverse magnetoresistance
spellingShingle Phase transition observation in Weyl semimetal candidate Mn3Ga epitaxial thin films evidenced by transverse magnetoresistance
Cota-Martínez , Isis M
Mn3Ga
Phase transitions
Spin structures
Tight-binding models
Transverse magnetoresistances
Weyl semimetal
title_short Phase transition observation in Weyl semimetal candidate Mn3Ga epitaxial thin films evidenced by transverse magnetoresistance
title_full Phase transition observation in Weyl semimetal candidate Mn3Ga epitaxial thin films evidenced by transverse magnetoresistance
title_fullStr Phase transition observation in Weyl semimetal candidate Mn3Ga epitaxial thin films evidenced by transverse magnetoresistance
title_full_unstemmed Phase transition observation in Weyl semimetal candidate Mn3Ga epitaxial thin films evidenced by transverse magnetoresistance
title_sort Phase transition observation in Weyl semimetal candidate Mn3Ga epitaxial thin films evidenced by transverse magnetoresistance
dc.creator.none.fl_str_mv Cota-Martínez , Isis M
Garay-Tapia , Andrés M
Medina-Vázquez , José A
Santillán-Rodríguez , Carlos R
Saénz-Hernández , Renee J
Gutiérrez-Pérez , Rm
Holguín Momaca, José Trinidad
Ross , Caroline A
Olive-Méndez , Sion Federico
López Antón, Ricardo
author Cota-Martínez , Isis M
author_facet Cota-Martínez , Isis M
Garay-Tapia , Andrés M
Medina-Vázquez , José A
Santillán-Rodríguez , Carlos R
Saénz-Hernández , Renee J
Gutiérrez-Pérez , Rm
Holguín Momaca, José Trinidad
Ross , Caroline A
Olive-Méndez , Sion Federico
López Antón, Ricardo
author_role author
author2 Garay-Tapia , Andrés M
Medina-Vázquez , José A
Santillán-Rodríguez , Carlos R
Saénz-Hernández , Renee J
Gutiérrez-Pérez , Rm
Holguín Momaca, José Trinidad
Ross , Caroline A
Olive-Méndez , Sion Federico
López Antón, Ricardo
author2_role author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Mn3Ga
Phase transitions
Spin structures
Tight-binding models
Transverse magnetoresistances
Weyl semimetal
topic Mn3Ga
Phase transitions
Spin structures
Tight-binding models
Transverse magnetoresistances
Weyl semimetal
description Hexagonal antiferromagnetic D019-Mn3X (X = Sn, Ge, Ga) compounds, with a non-collinear kagome spinstructure, exhibit novel topological transport properties such as colossal longitudinal magnetoresistance and itsevolution proportional to the E·B product. Here, we report on non-vanishing transverse magnetoresistance ofstrained epitaxial GaN (0001)/Mn3Ga films with the magnetic field in the out-of-plane direction and the electricfield in the film plane along two perpendicular directions. Strain induces pseudo-electromagnetic fields favoringa chiral anomaly and therefore the observation of magnetoresistance. We found an evolution from negativelinear to positive quadratic magnetoresistance dependence on the magnetic field in the temperature range from150 to 300 K, along with a metallic to a narrow band gap semiconductor transition at a temperature of 230 K.First-principles calculations confirmed this transition, proposing a spin structure evolution, and by the implementationof a tight-binding model, based on the Fu-Kane-Mele model, the topological transport properties wereanalyzed confirming the experimental findings.
publishDate 2026
dc.date.none.fl_str_mv 2026
2026
2026
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/10578/47949
url https://hdl.handle.net/10578/47949
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:RUIdeRA. Repositorio Institucional de la UCLM
instname:Universidad de Castilla-La Mancha
instname_str Universidad de Castilla-La Mancha
reponame_str RUIdeRA. Repositorio Institucional de la UCLM
collection RUIdeRA. Repositorio Institucional de la UCLM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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