Triple-Point Fermions in Ferroelectric GeTe

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dc.contributor.authorKrempaský, Juraj
dc.contributor.authorNicolai, Laurent Christophe
dc.contributor.authorGmitra, Martin
dc.contributor.authorChen, Houke
dc.contributor.authorFanciulli, Mauro
dc.contributor.authorGuedes, Eduardo B.
dc.contributor.authorCaputo, Marco
dc.contributor.authorRadović, Milan
dc.contributor.authorVolobuev, Valentine V.
dc.contributor.authorCaha, Ondřej
dc.contributor.authorSpringholz, Gunther
dc.contributor.authorMinár, Jan
dc.contributor.authorDil, J. Hugo
dc.date.accessioned2021-10-25T10:00:27Z
dc.date.available2021-10-25T10:00:27Z
dc.date.issued2021
dc.description.abstract-translatedFerroelectric α-GeTe is unveiled to exhibit an intriguing multiple nontrivial topology of the electronic band structure due to the existence of triple-point and type-II Weyl fermions, which goes well beyond the giant Rashba spin splitting controlled by external fields as previously reported. Using spin- and angle-resolved photoemission spectroscopy combined with ab initio density functional theory, the unique spin texture around the triple point caused by the crossing of one spin-degenerate and two spin-split bands along the ferroelectric crystal axis is derived. This consistently reveals spin winding numbers that are coupled with time-reversal symmetry and Lorentz invariance, which are found to be equal for both triple-point pairs in the Brillouin zone. The rich manifold of effects opens up promising perspectives for studying nontrivial phenomena and multicomponent fermions in condensed matter systems.en
dc.format6 s.cs
dc.format.mimetypeapplication/pdf
dc.identifier.citationKREMPASKÝ, J. NICOLAI, LCH. GMITRA, M. CHEN, H. FANCIULLI, M. GUEDES, EB. CAPUTO, M. RADOVIĆ, M. VOLOBUEV, VV. CAHA, O. SPRINGHOLZ, G. MINÁR, J. DIL, JH. Triple-Point Fermions in Ferroelectric GeTe. PHYSICAL REVIEW LETTERS, 2021, roč. 126, č. 20, s. nestránkováno. ISSN: 0031-9007cs
dc.identifier.document-number652839000013
dc.identifier.doi10.1103/PhysRevLett.126.206403
dc.identifier.issn0031-9007
dc.identifier.obd43933548
dc.identifier.uri2-s2.0-85106554461
dc.identifier.urihttp://hdl.handle.net/11025/45543
dc.language.isoenen
dc.project.IDEF15_003/0000358/Výpočetní a experimentální design pokročilých materiálů s novými funkcionalitamics
dc.publisherAmerican Physical Societyen
dc.relation.ispartofseriesPhysical Review Lettersen
dc.rightsPlný text není přístupný.cs
dc.rights©2021 American Physical Societyen
dc.rights.accessclosedAccessen
dc.subject.translatedphotoemissionen
dc.subject.translatedelectronic band structureen
dc.subject.translatedelectron spinen
dc.subject.translatedspin-orbit couplingen
dc.titleTriple-Point Fermions in Ferroelectric GeTeen
dc.typečlánekcs
dc.typearticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen

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