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Probing resonating valence bond states in artificial quantum magnets

Title
Probing resonating valence bond states in artificial quantum magnets
Authors
Yang, KaiPhark, Soo-HyonBae, YujeongEsat, TanerWillke, PhilipArdavan, ArzhangHeinrich, Andreas J.Lutz, Christopher P.
Ewha Authors
박수현Andreas Heinrich배유정
SCOPUS Author ID
박수현scopus; Andreas Heinrichscopus; 배유정scopus
Issue Date
2021
Journal Title
NATURE COMMUNICATIONS
ISSN
2041-1723JCR Link
Citation
NATURE COMMUNICATIONS vol. 12, no. 1
Publisher
NATURE RESEARCH
Indexed
SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
Designing and characterizing the many-body behaviors of quantum materials represents a prominent challenge for understanding strongly correlated physics and quantum information processing. We constructed artificial quantum magnets on a surface by using spin-1/2 atoms in a scanning tunneling microscope (STM). These coupled spins feature strong quantum fluctuations due to antiferromagnetic exchange interactions between neighboring atoms. To characterize the resulting collective magnetic states and their energy levels, we performed electron spin resonance on individual atoms within each quantum magnet. This gives atomic-scale access to properties of the exotic quantum many-body states, such as a finite-size realization of a resonating valence bond state. The tunable atomic-scale magnetic field from the STM tip allows us to further characterize and engineer the quantum states. These results open a new avenue to designing and exploring quantum magnets at the atomic scale for applications in spintronics and quantum simulations. The resonating valence bond state is a spin-liquid state where spins continuously alter their singlet partners. Here Yang et al. use spin-1/2 atoms precision-placed by a scanning tunnelling microscope to create artificial quantum magnets exhibiting the resonating valence bond state.
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DOI
10.1038/s41467-021-21274-5
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연구기관 > 기초과학연구소 > Journal papers
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