Bulk electronic structure of lanthanum hexaboride (LaB6) by hard x-ray angle-resolved photoelectron spectroscopy

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dc.contributor.authorRattanachata, Arunothai
dc.contributor.authorNicolai, Laurent Christophe
dc.contributor.authorMartins, Henrique P.
dc.contributor.authorConti, Giuseppina
dc.contributor.authorVerstraete, Matthieu J.
dc.contributor.authorGehlmann, Mathias
dc.contributor.authorUeda, Shigenori
dc.contributor.authorKobayashi, Keisuke
dc.contributor.authorVishik, Inna
dc.contributor.authorSchneider, Claus M.
dc.contributor.authorFadley, Charles S.
dc.contributor.authorGray, Alexander X.
dc.contributor.authorMinár, Jan
dc.contributor.authorNemšák, Slavomír
dc.date.accessioned2021-10-25T10:00:27Z
dc.date.available2021-10-25T10:00:27Z
dc.date.issued2021
dc.description.abstract-translatedIn the last decade rare-earth hexaborides have been investigated for their fundamental importance in condensed matter, and for their applications in advanced technological fields. Among these compounds, LaB6 has a special place, being a traditional d-band metal without additional f bands. In order to understand the bulk electronic structure of the more complex rare-earth hexaborides, in this paper we investigate the bulk electronic structure of LaB6 using tender/hard x-ray photoemission spectroscopy, measuring both core-level and angle-resolved valence-band spectra. Furthermore, we compare the La 3d core level spectrum to cluster model calculations in order to understand the bulklike core-hole screening effects. The results show that the La 3d well-screened peak is at a lower binding energy compared to the main poorly screened peak; the relative intensity between these peaks depends on how strong the hybridization is between La and B atoms. We show that the recoil effect, negligible in the soft x-ray regime, becomes prominent at higher kinetic energies for lighter elements, such as boron, but is still negligible for heavy elements, such as lanthanum. In addition, we report the bulklike band structure of LaB6 determined by tender/hard x-ray angle-resolved photoemission spectroscopy (HARPES). We compare HARPES experimental results to the free-electron final-state calculations and to the more precise one-step photoemission theory including matrix element and phonon excitation effects. The agreement between the features present in the experimental ARPES data and the theoretical calculations is very good. In addition, we consider the nature and the magnitude of phonon excitations in order to interpret HARPES experimental data measured at different temperatures and excitation energies. We demonstrate that the one-step theory of photoemission and HARPES experiments provides, at present, the only approach capable of probing, both experimentally and theoretically, true “bulklike” electronic band structure of rare-earth hexaborides and strongly correlated materials.en
dc.format12 s.cs
dc.format.mimetypeapplication/pdf
dc.identifier.citationRATTANACHATA, A. NICOLAI, LCH. MARTINS, HP. CONTI, G. VERSTRAETE, MJ. GEHLMANN, M. UEDA, S. KOBAYASHI, K. VISHIK, I. SCHNEIDER, CM. FADLEY, CHS. GRAY, AX. MINÁR, J. NEMŠÁK, S. Bulk electronic structure of lanthanum hexaboride (LaB6) by hard x-ray angle-resolved photoelectron spectroscopy. PHYSICAL REVIEW MATERIALS, 2021, roč. 5, č. 5, s. nestránkováno. ISSN: 2475-9953cs
dc.identifier.document-number655935700006
dc.identifier.doi10.1103/PhysRevMaterials.5.055002
dc.identifier.issn2475-9953
dc.identifier.obd43933545
dc.identifier.uri2-s2.0-85107571380
dc.identifier.urihttp://hdl.handle.net/11025/45542
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 Materialsen
dc.rightsPlný text není přístupný.cs
dc.rights©2021 American Physical Societyen
dc.rights.accessclosedAccessen
dc.subject.translatedphotoemissionen
dc.subject.translatedhard X-rayen
dc.subject.translatedelectronic band structureen
dc.titleBulk electronic structure of lanthanum hexaboride (LaB6) by hard x-ray angle-resolved photoelectron spectroscopyen
dc.typečlánekcs
dc.typearticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen

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