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Probing Magnetism in Artificial Metal-Organic Complexes Using Electronic Spin Relaxometry

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Title
Probing Magnetism in Artificial Metal-Organic Complexes Using Electronic Spin Relaxometry
Author(s)
Xue Zhang; Philip Willke; Aparajita Singha; Christoph Wolf; Taner Esat; Minhee Choi; Andreas J. Heinrich; Taeyoung Choi
Subject
INDIVIDUAL ATOMS, ; TETRACYANOETHYLENE, ; MANIPULATION, ; TRANSITION, ; INTERFACE
Publication Date
2020-07
Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS, v.11, no.14, pp.5618 - 5624
Publisher
AMER CHEMICAL SOC
Abstract
© 2020 American Chemical Society. Single spins are considered as a versatile candidate for miniaturizing information devices down to the nanoscale. To engineer the spin's properties, metal-organic frameworks provide a promising route which in turn requires thorough understanding of the metal-molecule interaction. Here, we investigate the magnetic robustness of a single iron (Fe) atom in artificially built Fe-tetracyanoethylene (TCNE) complexes by using low-temperature scanning tunneling microscopy (STM). We find that the magnetic anisotropy and spin relaxation dynamics of the Fe atom within the complexes remain unperturbed in comparison to well-isolated Fe atoms. Density functional theory (DFT) calculations support our experimental findings, suggesting that the 3d orbitals of the Fe atom remain largely undisturbed while the 4s and 4p orbitals are rearranged in the process of forming a complex. To precisely determine the location of the spin center within the complex, we utilize STM-based spin relaxometry, mapping out the spatial dependence of spin relaxation with subnanometer resolution. Our work suggests that the magnetic properties of atoms can remain unchanged while being embedded in a weakly bound molecular framework
URI
https://pr.ibs.re.kr/handle/8788114/7762
DOI
10.1021/acs.jpclett.0c01281
ISSN
1948-7185
Appears in Collections:
Center for Quantum Nanoscience(양자나노과학 연구단) > 1. Journal Papers (저널논문)
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