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Spin-dependent vibronic response of a carbon radical ion in two-dimensional WS(2)

Atomic spin centers in 2D materials are a highly anticipated building block for quantum technologies. Here, we demonstrate the creation of an effective spin-1/2 system via the atomically controlled generation of magnetic carbon radical ions (CRIs) in synthetic two-dimensional transition metal dichal...

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Detalles Bibliográficos
Autores principales: Cochrane, Katherine A., Lee, Jun-Ho, Kastl, Christoph, Haber, Jonah B., Zhang, Tianyi, Kozhakhmetov, Azimkhan, Robinson, Joshua A., Terrones, Mauricio, Repp, Jascha, Neaton, Jeffrey B., Weber-Bargioni, Alexander, Schuler, Bruno
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8674275/
https://www.ncbi.nlm.nih.gov/pubmed/34911952
http://dx.doi.org/10.1038/s41467-021-27585-x
Descripción
Sumario:Atomic spin centers in 2D materials are a highly anticipated building block for quantum technologies. Here, we demonstrate the creation of an effective spin-1/2 system via the atomically controlled generation of magnetic carbon radical ions (CRIs) in synthetic two-dimensional transition metal dichalcogenides. Hydrogenated carbon impurities located at chalcogen sites introduced by chemical doping are activated with atomic precision by hydrogen depassivation using a scanning probe tip. In its anionic state, the carbon impurity is computed to have a magnetic moment of 1 μ(B) resulting from an unpaired electron populating a spin-polarized in-gap orbital. We show that the CRI defect states couple to a small number of local vibrational modes. The vibronic coupling strength critically depends on the spin state and differs for monolayer and bilayer WS(2). The carbon radical ion is a surface-bound atomic defect that can be selectively introduced, features a well-understood vibronic spectrum, and is charge state controlled.