Electron spin spectroscopy of single TEMPO dimers coupled via interfering tunneling currents

Autor:	Manassen, Yishay, Jbara, Moamen, Averbukh, Michael, Hazan, Zion, Henkel, Carsten, Horovitz, Baruch
Rok vydání:	2022
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Physics - Chemical Physics
Zdroj:	Phys. Rev. B 105 (2022) 235438
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.105.235438
Popis:	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. Comment: 5 pages, 3 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2201.12154 Zobrazit plný text záznamu View this record from Arxiv