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PhysRevB.108.045427.pdf | 2.91 MB | Adobe 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 ![]() ![]() ![]() 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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