[2D12-21] Surface Science (SS1) Physical Property

3:30 PM - 3:45 PM JST(6:30 AM - 6:45 AM UTC)

[2D16] Study on the surface of α-oxygen solid with frequency modulation dynamic force microscopy

*Zhengxi Lu¹, Yanran Li^1,2, Yuuki Yasui¹, Yoshiaki Sugimoto¹ (1. Graduate School of Frontier Sciences, The University of Tokyo (Japan), 2. The Department of physics and astronomy, University of California, Davis (USA))

Solid oxygen is a unique molecular crystal formed from homonuclear diatomic O₂ molecules with spin S = 1. Although chemically simple, solid oxygen exhibits rich structural behavior because its crystal structure is governed by a delicate balance between van der Waals and magnetic exchange interactions. Previous studies of O₂ monolayers on Ag(111) revealed coverage-dependent structures, including low-density flat-lying and high-density upright molecular phases, as well as temperature-dependent lattice distortions related to α- and β-like structures. However, the growth process from adsorbed O₂ molecules to multilayer crystalline solid oxygen remains unclear. In this study, we investigate O₂ films grown on Au(111) up to ~30 monolayers using FM-DFM at 4.3 K. Atomic-resolution imaging of the α-phase solid oxygen surface allows us to discuss the layer-dependent growth behavior of solid O₂ on a metal substrate.

Password required to view