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PhysRevB.108.045427.pdf2.91 MBAdobe PDF見る/開く
タイトル: Moiré superlattice and two-dimensional free-electron-like states of indium triple-layer structure on Si(111)
著者: Hatta, Shinichiro
Kuroishi, Kenta
Yukawa, Keisuke
Murata, Tomoka
Okuyama, Hiroshi  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0002-6031-0612 (unconfirmed)
Aruga, Tetsuya
著者名の別形: 八田, 振一郎
黒石, 健太
湯川, 恵介
村田, 朋香
奥山, 弘
有賀, 哲也
キーワード: Surface states
2-dimensional systems
Ultrathin films
Angle-resolved photoemission spectroscopy
Low-energy electron diffraction
Scanning tunneling microscopy
Condensed Matter, Materials & Applied Physics
発行日: Jul-2023
出版者: American Physical Society (APS)
誌名: Physical Review B
巻: 108
号: 4
論文番号: 045427
抄録: We studied the growth of an indium triple-atomic-layer film and the two-dimensional free-electron-like electronic states on Si(111) by low-energy electron diffraction (LEED), scanning tunneling microscopy (STM), and angle-resolved photoelectron spectroscopy (ARPES). By depositing In on the In/Si(111)- √ 7 × √ 3-rect surface below 100 K, followed by brief postannealing up to 140 K, we successfully obtained well-crystalline films exhibiting sharp superstructure LEED spots. We revealed an (11 × 11) superlattice of the triple-layer structure, while both LEED and STM showed a (5.5 × 5.5) pseudoperiodicity. This pseudoperiodicity was attributed to the moiré interference between the Si(111)-(11 × 11) lattice (a = 3.84 Å) and the In (13 × 13) hexagonal lattice, which has a lattice constant of 3.25 Å, with the ratio very close to 13/11. ARPES measurements unveiled two free-electron-like states with Fermi wave vectors of 1.32 and 1.46 Å⁻¹. We also observed replica Fermi surfaces, which are associated with the reciprocal lattice vectors of both the (1 × 1) Si(111) and the In hexagonal layers. This further confirms the hexagonal atomic arrangement of the In triple-layer structure.
著作権等: ©2023 American Physical Society
URI: http://hdl.handle.net/2433/284926
DOI(出版社版): 10.1103/PhysRevB.108.045427
出現コレクション:学術雑誌掲載論文等

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