Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) SAKAMOTO Kazuyuki,Core-level photoemission study of thallium adsorbed on a Si(111)-(7x7) surface : Valence state of thallium and the charge state of surface Si atoms,Physical Review B 74・7,,,2006,,,75335,https://cir.nii.ac.jp/crid/1010000781940210050,