Tunnel current noise spectra of spins in individual dimers of molecular radicals

Yishay Manassen; Moamen Jbara; Michael Averbukh; Zion Hazan; Carsten Henkel; Baruch Horovitz

doi:10.1103/PhysRevB.105.235438

Tunnel current noise spectra of spins in individual dimers of molecular radicals

Yishay Manassen, Moamen Jbara, Michael Averbukh, Zion Hazan, Carsten Henkel, Baruch Horovitz

Department of Physics

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

We report the detection of electron spin resonance (ESR) in individual dimers of the stable free radical 2,2,6,6-tetramethyl-piperidine-1-oxyl (TEMPO). ESR is measured by the current fluctuations in a scanning tunneling microscope (ESR-STM method). The multipeak power spectra, distinct from macroscopic data, are assigned to dimers having exchange and Dzyaloshinskii-Moriya interactions in the presence of spin-orbit coupling. These interactions are generated in our model by interfering electronic tunneling pathways from tip to sample via the dimer's two molecules. This is the first demonstration that tunneling via two spins is a valid mechanism of the ESR-STM method.

Original language	English
Article number	235438
Journal	Physical Review B
Volume	105
Issue number	23
DOIs	https://doi.org/10.1103/PhysRevB.105.235438
State	Published - 15 Jun 2022

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.105.235438

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title = "Tunnel current noise spectra of spins in individual dimers of molecular radicals",

abstract = "We report the detection of electron spin resonance (ESR) in individual dimers of the stable free radical 2,2,6,6-tetramethyl-piperidine-1-oxyl (TEMPO). ESR is measured by the current fluctuations in a scanning tunneling microscope (ESR-STM method). The multipeak power spectra, distinct from macroscopic data, are assigned to dimers having exchange and Dzyaloshinskii-Moriya interactions in the presence of spin-orbit coupling. These interactions are generated in our model by interfering electronic tunneling pathways from tip to sample via the dimer's two molecules. This is the first demonstration that tunneling via two spins is a valid mechanism of the ESR-STM method.",

author = "Yishay Manassen and Moamen Jbara and Michael Averbukh and Zion Hazan and Carsten Henkel and Baruch Horovitz",

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AU - Manassen, Yishay

AU - Jbara, Moamen

AU - Averbukh, Michael

AU - Hazan, Zion

AU - Henkel, Carsten

AU - Horovitz, Baruch

PY - 2022/6/15

Y1 - 2022/6/15

N2 - We report the detection of electron spin resonance (ESR) in individual dimers of the stable free radical 2,2,6,6-tetramethyl-piperidine-1-oxyl (TEMPO). ESR is measured by the current fluctuations in a scanning tunneling microscope (ESR-STM method). The multipeak power spectra, distinct from macroscopic data, are assigned to dimers having exchange and Dzyaloshinskii-Moriya interactions in the presence of spin-orbit coupling. These interactions are generated in our model by interfering electronic tunneling pathways from tip to sample via the dimer's two molecules. This is the first demonstration that tunneling via two spins is a valid mechanism of the ESR-STM method.

AB - We report the detection of electron spin resonance (ESR) in individual dimers of the stable free radical 2,2,6,6-tetramethyl-piperidine-1-oxyl (TEMPO). ESR is measured by the current fluctuations in a scanning tunneling microscope (ESR-STM method). The multipeak power spectra, distinct from macroscopic data, are assigned to dimers having exchange and Dzyaloshinskii-Moriya interactions in the presence of spin-orbit coupling. These interactions are generated in our model by interfering electronic tunneling pathways from tip to sample via the dimer's two molecules. This is the first demonstration that tunneling via two spins is a valid mechanism of the ESR-STM method.

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Tunnel current noise spectra of spins in individual dimers of molecular radicals

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