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Coherent Spin Control of Single Molecules on a Surface

Willke, Philip ORCID iD icon; Bilgeri, Tobias; Zhang, Xue; Wang, Yu; Wolf, Christoph; Aubin, Herve; Heinrich, Andreas; Choi, Taeyoung


Control of single electron spins constitutes one of the most promising platforms for spintronics, quantum sensing, and quantum information processing. Utilizing single molecular magnets as their hosts establishes an interesting framework since their molecular structure is highly flexible and chemistry-based large-scale synthesis directly provides a way toward scalability. Here, we demonstrate coherent spin manipulation of single molecules on a surface, which we control individually using a scanning tunneling microscope in combination with electron spin resonance. We previously found that iron phthalocyanine (FePc) molecules form a spin-1/2 system when placed on an insulating thin film of magnesium oxide (MgO). Performing Rabi oscillation and Hahn echo measurements, we show that the FePc spin can be coherently manipulated with a phase coherence time T$_{2}$$^{Echo}$ of several hundreds of nanoseconds. Tunneling current-dependent measurements demonstrate that interaction with the tunneling electrons is the dominating source of decoherence. In addition, we perform Hahn echo measurements on small self-assembled arrays of FePc molecules. We show that, despite additional intermolecular magnetic coupling, spin resonance and T$_{2}$$^{Echo}$ are much less perturbed by T1 spin flip events of neighboring spins than by the tunneling current. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000140544
Veröffentlicht am 04.12.2021
DOI: 10.1021/acsnano.1c06394
Zitationen: 13
Web of Science
Zitationen: 10
Zitationen: 17
Cover der Publikation
Zugehörige Institution(en) am KIT Physikalisches Institut (PHI)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 1936-0851, 1936-086X
KITopen-ID: 1000140544
Erschienen in ACS Nano
Verlag American Chemical Society (ACS)
Band 15
Heft 11
Seiten 17959–17965
Nachgewiesen in Dimensions
Web of Science
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