Temperature Dependence of Relativistic Valence Band Splitting Induced by an Altermagnetic Phase Transition

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dc.contributor.authorHajlaoui, Mahdics
dc.contributor.authorWilfred D'Souza, Sunilcs
dc.contributor.authorŠmejkal, Liborcs
dc.contributor.authorKriegner, Dominikcs
dc.contributor.authorKrizman, Gauthiercs
dc.contributor.authorZakusylo, Tetianacs
dc.contributor.authorOlszowska, Nataliacs
dc.contributor.authorCaha, Ondřejcs
dc.contributor.authorMichalička, Jancs
dc.contributor.authorSánchez-Barriga, Jaimecs
dc.contributor.authorMarmodoro, Albertocs
dc.contributor.authorVýborný, Karelcs
dc.contributor.authorErnst, Arthurcs
dc.contributor.authorCinchetti, Mirkocs
dc.contributor.authorMinár, Jáncs
dc.contributor.authorJungwirth, Tomášcs
dc.contributor.authorSpringholz, Gunthercs
dc.coverage.issue31cs
dc.coverage.volume36cs
dc.date.accessioned2025-03-25T17:40:14Z
dc.date.available2025-03-25T17:40:14Z
dc.date.issued2024-08-01cs
dc.description.abstractAltermagnetic (AM) materials exhibit non-relativistic, momentum-dependent spin-split states, ushering in new opportunities for spin electronic devices. While the characteristics of spin-splitting are documented within the framework of the non-relativistic spin group symmetry, there is limited exploration of the inclusion of relativistic symmetry and its impact on the emergence of a novel spin-splitting in the band structure. This study delves into the intricate relativistic electronic structure of an AM material, alpha-MnTe. Employing temperature-dependent angle-resolved photoelectron spectroscopy across the AM phase transition, the emergence of a relativistic valence band splitting concurrent with the establishment of magnetic order is elucidated. This discovery is validated through disordered local moment calculations, modeling the influence of magnetic order on the electronic structure and confirming the magnetic origin of the observed splitting. The temperature-dependent splitting is ascribed to the advent of relativistic spin-splitting resulting from the strengthening of AM order in alpha-MnTe as the temperature decreases. This sheds light on a previously unexplored facet of this intriguing material. Altermagnets exhibit momentum-dependent spin-split states providing new opportunities for spin electronic devices. Through temperature-dependent angle-resolved photoemission spectroscopy and disordered local moment calculations, it is demonstrated that the relativistic valence band splitting of the prototypical MnTe altermagnet is of magnetic origin. This is attributed to a novel relativistic spin-splitting phenomenon concurrent with the establishment of the altermagnetic order below the N & eacute;el temperature. imageen
dc.formattextcs
dc.format.extent1-8cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationADVANCED MATERIALS. 2024, vol. 36, issue 31, p. 1-8.en
dc.identifier.doi10.1002/adma.202314076cs
dc.identifier.issn1521-4095cs
dc.identifier.orcid0000-0001-6231-0061cs
dc.identifier.other190000cs
dc.identifier.urihttps://hdl.handle.net/11012/250179
dc.language.isoencs
dc.publisherWILEY-V C H VERLAG GMBHcs
dc.relation.ispartofADVANCED MATERIALScs
dc.relation.urihttps://onlinelibrary.wiley.com/doi/10.1002/adma.202314076cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1521-4095/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectaltermagnetismen
dc.subjectangle-resolved photoemission spectroscopyen
dc.subjectelectronic band structureen
dc.subjectspintronicsen
dc.titleTemperature Dependence of Relativistic Valence Band Splitting Induced by an Altermagnetic Phase Transitionen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
eprints.grantNumberinfo:eu-repo/grantAgreement/MSM/EH/EH22_008/0004572cs
sync.item.dbidVAV-190000en
sync.item.dbtypeVAVen
sync.item.insts2025.03.25 18:40:14en
sync.item.modts2025.03.25 13:33:14en
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Sdílená laboratoř RP1cs
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