Stable \(\pi\)-radical 2,2-diphenyl-1-picrylhydrazyl (DPPH) adsorbed at the elbows of \(22\times\sqrt{3}\) reconstructed Au(111)

Stable organic radicals serve as model systems for investigating metal-free magnetic phenomena at (sub)nanometer length scales. We have investigated at the single-molecule level the stable \(\pi\)-radical 2,2-diphenyl-1-picrylhydrazyl (DPPH) adsorbed at the elbow sites of the \(22\times\sqrt{3}\) re...

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Bibliographic Details
Published in:arXiv.org 2021-01
Main Authors: Vranik, Radovan, Stetsovych, Vitalii, Feigl, Simon, Müllegger, Stefan
Format: Article
Language:English
Subjects:
Electron spin
Gold
Low temperature
Scanning tunneling microscopy
Ultrahigh vacuum
Online Access:Get full text
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Summary:Stable organic radicals serve as model systems for investigating metal-free magnetic phenomena at (sub)nanometer length scales. We have investigated at the single-molecule level the stable \(\pi\)-radical 2,2-diphenyl-1-picrylhydrazyl (DPPH) adsorbed at the elbow sites of the \(22\times\sqrt{3}\) reconstructed Au(111) surface. Low-temperature scanning tunneling microscopy (STM) and -spectroscopy under ultrahigh vacuum conditions at 8~K reveal structural as well as frontier-orbital related electronic details of DPPH/Au(111). A Kondo-like spectroscopic signature indicates preservation of the unpaired electron spin state.
ISSN:2331-8422
DOI:10.48550/arxiv.2101.04463