TY - UNPB
T1 - Electron spin spectroscopy of single TEMPO dimers coupled via interfering tunneling currents
AU - Manassen, Yishay
AU - Jbara, Moamen
AU - Averbukh, Michael
AU - Hazan, Zion
AU - Henkel, Carsten
AU - Horovitz, Baruch
PY - 2022/1/1
Y1 - 2022/1/1
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
tunnelling microscope (ESR-STM method). The multi-peak power spectra,
distinct from macroscopic data, are assigned to dimers having exchange
and Dzyaloshinskii-Moriya interactions in 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
tunnelling microscope (ESR-STM method). The multi-peak power spectra,
distinct from macroscopic data, are assigned to dimers having exchange
and Dzyaloshinskii-Moriya interactions in 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.
KW - Condensed Matter - Mesoscale and Nanoscale Physics
KW - Physics - Chemical Physics
M3 - Preprint
BT - Electron spin spectroscopy of single TEMPO dimers coupled via interfering tunneling currents
ER -