Coherent Spin Control of Single Molecules on a Surface
- 주제(키워드) scanning tunneling microscopy , electron spin resonance , iron phthalocyanine , quantum coherence , spin state , Hahn echo , Rabi oscillations
- 주제(기타) Chemistry, Multidisciplinary
- 주제(기타) Chemistry, Physical
- 주제(기타) Nanoscience & Nanotechnology
- 주제(기타) Materials Science, Multidisciplinary
- 설명문(일반) [Willke, Philip; Bilgeri, Tobias; Zhang, Xue; Wang, Yu; Wolf, Christoph; Heinrich, Andreas; Choi, Taeyoung] Inst Basic Sci IBS, Ctr Quantum Nanosci, Seoul 03760, South Korea; [Willke, Philip; Bilgeri, Tobias; Zhang, Xue; Wang, Yu; Wolf, Christoph] Ewha Womans Univ, Seoul 03760, South Korea; [Bilgeri, Tobias] Ecole Polytech Fed Lausanne, Inst Phys, CH-1015 Lausanne, Switzerland; [Aubin, Herve] Univ Paris Sud, Univ Paris Saclay, Ctr Nanosci & Nanotechnol CNRS, C2N, F-91120 Palaiseau, France; [Willke, Philip] Karlsruhe Inst Technol, Phys Inst, D-76131 Karlsruhe, Germany; [Heinrich, Andreas; Choi, Taeyoung] Ewha Womans Univ, Dept Phys, Seoul 03760, South Korea
- 등재 SCIE, SCOPUS
- OA유형 Green Published
- 발행기관 AMER CHEMICAL SOC
- 발행년도 2021
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000190264
- 본문언어 영어
- Published As https://doi.org/10.1021/acsnano.1c06394
- PubMed https://pubmed.ncbi.nlm.nih.gov/34767351
초록/요약
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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