Work

Growth of Si on Ag(111) and determination of large commensurate unit cell of high-temperature phase

Year: 2014

Type: article

Abstract: We studied the structural transition for silicon adsorption on Ag(111) by using low-energy electron diffraction (LEED) and Auger electron spectroscopy at various substrate temperatures during deposition. We obtained a single phase of the (4 × 4) structure at 520 K, which was reported as a silicene. At 620 K, the (4 × 4) structure changed to a high-temperature phase which was determined as by LEED, while in preceding works, it was assigned to a quasi or structure. Although the high-temperature phase had not been observed as a single phase, we obtained LEED patterns with a single phase for it, which enabled us to explain all the diffraction spots on the basis of the kinematic theory including double diffraction. The was obtained by the multiplication of a subunit cell. We concluded that the and phases could instead be represented as a phase, and we proposed a possible atomic model.

Source: Japanese Journal of Applied Physics

DOI: 10.7567/jjap.54.015502

Authors: Md. Sazzadur Rahman, Takeshi Nakagawa, Seigi Mizuno

Institution: Kyushu University

Language: English

Topic: Surface and Thin Film Phenomena

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: bronze

Funder: Japan Society for the Promotion of Science

Award: Investigation of giant magnetic anisotropy and coercivity in transition metal magnetic nano structures