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Magnetic Resonance Imaging of Single Atoms
Mesoscale and Nanoscale Physics · Submitted 24 Jul 2018
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim Here, we demonstrate for the first time MRI of individual atoms on a surface.
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The abstract, sentence by sentence
Magnetic resonance imaging (MRI) revolutionized diagnostic medicine and biomedical research by allowing a noninvasive access to spin ensembles. To enhance MRI resolution to the nanometer scale, new approaches including scanning probe methods have been used in recent years, which culminated in detection of individual spins. This allowed three-dimensional (3D) visualization of organic samples and of sophisticated spin-structures. Here, we demonstrate for the first time MRI of individual atoms on a surface. The setup, implemented in a cryogenic scanning tunneling microscope (STM), uses single-atom electron spin resonance (ESR) to achieve sub-{\AA}ngstr\"om resolution exceeding the spatial resolution of previous experiments by one to two orders of magnitude. We find that MRI scans of different atomic species and probe tips lead to unique signatures in the resonance images. These signatures reveal the magnetic interactions between the tip and the atom, in particular magnetic dipolar and exchange interaction.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | Magnetic resonance imaging (MRI) revolutionized diagnostic medicine and biomedical research by allowing a noninvasive access to spin ensembles. | background 1.00 | 0.03 | 0.02 | asserted 1.00 |
| s1 | To enhance MRI resolution to the nanometer scale, new approaches including scanning probe methods have been used in recent years, which culminated in detection of individual spins. | background 1.00 | 0.05 | 0.03 | asserted 1.00 |
| s2 | This allowed three-dimensional (3D) visualization of organic samples and of sophisticated spin-structures. | background 0.84 | 0.16 | 0.04 | asserted 1.00 |
| s3 | Here, we demonstrate for the first time MRI of individual atoms on a surface. | contribution 1.00 | 0.96 | 0.65 | asserted 1.00 |
| s4 | The setup, implemented in a cryogenic scanning tunneling microscope (STM), uses single-atom electron spin resonance (ESR) to achieve sub-{\AA}ngstr\"om resolution exceeding the spatial resolution of previous experiments by one to two orders of magnitude. | method 0.95 | 0.91 | 0.21 | asserted 1.00 |
| s5 | We find that MRI scans of different atomic species and probe tips lead to unique signatures in the resonance images. | result 1.00 | 0.96 | 0.22 | asserted 1.00 |
| s6 | These signatures reveal the magnetic interactions between the tip and the atom, in particular magnetic dipolar and exchange interaction. | interpretation 0.96 | 0.88 | 0.29 | asserted 1.00 |
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The paper
Original abstract
Magnetic resonance imaging (MRI) revolutionized diagnostic medicine and biomedical research by allowing a noninvasive access to spin ensembles. To enhance MRI resolution to the nanometer scale, new approaches including scanning probe methods have been used in recent years, which culminated in detection of individual spins. This allowed three-dimensional (3D) visualization of organic samples and of sophisticated spin-structures. Here, we demonstrate for the first time MRI of individual atoms on a surface. The setup, implemented in a cryogenic scanning tunneling microscope (STM), uses single-atom electron spin resonance (ESR) to achieve sub-{\AA}ngstr\"om resolution exceeding the spatial resolution of previous experiments by one to two orders of magnitude. We find that MRI scans of different atomic species and probe tips lead to unique signatures in the resonance images. These signatures reveal the magnetic interactions between the tip and the atom, in particular magnetic dipolar and exchange interaction.
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[ref] This has allowed access to the dipolar interaction between close magnetic adatoms, GPS-like localization of magnetic impurities on a surface, [ref] single-atom magnetic resonance imaging, [ref] and spectroscopy, [ref] probing an adatom quantum coherence, [ref] tailoring the spin interactions between $S=1/2$ spins, [ref] measuring and manipulating the hyperfine interaction of individual atoms [ref] and molecules [ref] or controlling the nuclear polarization of individual atoms.
A cotunneling mechanism for all-electrical Electron Spin Resonance of single adsorbed atoms · Introduction · 0.87
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