Publications by authors named "J Scott Teeter"
The adsorption of the radical α,ɣ-bisdiphenylene-β-phenylallyl (BDPA) molecule to the Cu(100) surface was studied using scanning tunnelling microscopy (STM), scanning tunnelling spectroscopy (STS), and density functional theory (DFT) calculations accounting for dispersion forces. BDPA on Cu(100) was observed to align preferentially along directions due to weak Cu-C chemisorption between fluorenyl carbons with the underlying copper atoms. The curved shape of the BDPA molecule on Cu(100) can be ascribed to the lack of molecular orbital character on the phenyl substituent.
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- - The study explores the stability and manipulation of 1D van der Waals materials, focusing on two specific examples: MoI and TaSeI, showing that individual atomic chains can be processed and stabilized.
- - High-resolution imaging techniques confirm the existence of stable atomic chains of MoI at room temperature, while TaSeI allows for the creation of suspended chains using electron beams.
- - The research includes ab initio calculations that validate the stability and cleavage energies of these 1D materials, demonstrating the feasibility of top-down processing methods at the atomic level.
Article Synopsis
- Researchers are exploring how to synthesize graphene nanoribbons (GNRs) of specific shapes and sizes using specially designed fluorine-bearing molecular precursors, which are important for electronic applications.
- The study focuses on the optimal temperature needed for the deposition of a new precursor (CHFI) that leads to the formation of GNRs on gold substrates (Au(111)), revealing that lower temperatures hinder adsorption.
- Through techniques like scanning tunneling microscopy and X-ray photoelectron spectroscopy, the research explains the growth mechanisms of GNRs and sets the groundwork for creating them on nonmetallic materials in the future.
The unique spin texture of quantum states in topological materials underpins many proposed spintronic applications. However, realizations of such great potential are stymied by perturbations, such as temperature and local fields imposed by impurities and defects, that can render a promising quantum state uncontrollable. Here, we report room-temperature scanning tunneling microscopy/spectroscopy observation of interaction between Rashba states and topological surface states, which manifests local electronic structure along step edges controllable by the layer thickness of thin films.
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