Subatomic-scale resolution with SPM: Co adatom on p(2 × 1)Cu(110):O. (4th January 2019)

• Record Type: Journal Article
• Authors: Turanský, R; Palotás, K; Brndiar, J; Li, Y J; Sugawara, Y; Štich, I
• Is Part Of: Nanotechnology. Volume 30:Number 9(2019)
• Publication Date: 2019-01-04
• Subjects: STM -- AFM -- subatomic resolution -- transition metal adatom -- DFT -- Hubbard U; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/aaf6dc
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: We study the limits of SPM subatomic resolution in imaging orbital magnetic features on a model system of a Co atom on a p (2 × 1)Cu(110):O surface. We show that scanning tunneling spectroscopies allow the determination of the occupation of the Co d shells and the value of the Hubbard U in the DFT + U modeling, and that standard near-contact AFM can in principle image the asymmetry due to partial filling of the d shells at close distances in the small-amplitude regime. Due to the partially ionic character of Co, a faint asymmetry is predicted to also arise in the electrostatic force. We anticipate these features to be even stronger for a transition metal adsorbate featuring larger departures from sphericality in charge/spin densities.