期刊
ACS NANO
卷 15, 期 11, 页码 17959-17965出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.1c06394
关键词
scanning tunneling microscopy; electron spin resonance; iron phthalocyanine; quantum coherence; spin state; Hahn echo; Rabi oscillations
类别
资金
- Institute for Basic Science [IBSR027-D1]
- Swiss National Science Foundation [200020_176932]
- DFG [WI5486/1-1]
- Baden Wurttemberg Foundation Program on Quantum Technologies (Project AModiQuS)
- National Research Foundation of Korea [2019R1A4A1029052]
- Swiss National Science Foundation (SNF) [200020_176932] Funding Source: Swiss National Science Foundation (SNF)
- National Research Foundation of Korea [2019R1A4A1029052] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Control of single electron spins is promising for spintronics. Using single molecular magnets as hosts allows for coherent spin manipulation and individual addressable molecular spins in self-assemblies.
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 T-1 spin flip events of neighboring spins than by the tunneling current. This will potentially allow for individual addressable molecular spins in self-assemblies and with application for quantum information processing.
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