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Studies of magnetic dipolar interaction between individual atoms using ESR-STM

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Title
Studies of magnetic dipolar interaction between individual atoms using ESR-STM
Author(s)
Taeyoung Choi; Christopher P. Lutz; Andreas J. Heinrich
Publication Date
2017-11
Journal
CURRENT APPLIED PHYSICS, v.17, no.11, pp.1513 - 1517
Publisher
ELSEVIER SCIENCE BV
Abstract
Sensing magnetic interactions at the atomic scale and utilizing those interactions for magnetometry have been highly challenging and important topics in the magnetic resonance community. Recently, electron spin resonance and scanning tunneling microscopy (ESR-STM) have been successfully combined, enabling spin resonance of individual atoms on ultrathin insulating MgO surfaces. When two magnetic atoms are positioned within the separation range of 1 nm–4 nm, two spectral features appear in the ESR measurement. The difference in those two frequencies follows a r−3 distance-dependence, indicating that the individual atoms are coupled through the magnetic dipolar interaction. Here, we discuss the spin relaxation times that lead to the observed ESR spectra. In addition, we suggest a quantum Hamiltonian model to obtain further insights toward, for example, studies of frustrated spin systems. © 2017 Elsevier B.V
URI
https://pr.ibs.re.kr/handle/8788114/4095
ISSN
1567-1739
Appears in Collections:
Center for Quantum Nanoscience(양자나노과학 연구단) > Journal Papers (저널 논문)
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