{"title":"Probing buried interface band dispersion of a MgO/Fe heterostructure with hard X-ray angle-resolved photoemission","authors":"Shigenori Ueda, Masaki Mizuguchi","doi":"10.35848/1882-0786/ad5e33","DOIUrl":null,"url":null,"abstract":"\n Interface band dispersion of a MgO(2 nm)/Fe(50 nm) heterostructure was detected by hard X-ray angle-resolved photoemission spectroscopy (HARPES) with the excitation photon energy of 3.29 keV by utilizing X-ray total reflection (TR). By subtracting bulk-sensitive band dispersion of the buried Fe(001) obtained by HARPES in the non-TR condition from near-interface-sensitive Fe(001) band dispersion obtained by TR-HARPES, the band-folding of Fe and the O 2p -Fe 3d hybridization at the heterointerface were clearly unveiled. These results suggest that HARPES can probe not only bulk band but also buried interface band of heterojunctions.","PeriodicalId":503885,"journal":{"name":"Applied Physics Express","volume":"10 3‐5","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Physics Express","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.35848/1882-0786/ad5e33","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Interface band dispersion of a MgO(2 nm)/Fe(50 nm) heterostructure was detected by hard X-ray angle-resolved photoemission spectroscopy (HARPES) with the excitation photon energy of 3.29 keV by utilizing X-ray total reflection (TR). By subtracting bulk-sensitive band dispersion of the buried Fe(001) obtained by HARPES in the non-TR condition from near-interface-sensitive Fe(001) band dispersion obtained by TR-HARPES, the band-folding of Fe and the O 2p -Fe 3d hybridization at the heterointerface were clearly unveiled. These results suggest that HARPES can probe not only bulk band but also buried interface band of heterojunctions.
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