2019/04/17 by J. Reina Gálvez, Christoph Wolf, C. Wolf +4
Chemistry · Engineering · Physics and Astronomy · #Amplitude #Atomic physics #Chemistry #Condensed matter physics #Electric field #Electron #Electron paramagnetic resonance #Mechanical and Optical Resonators #Molecular Junctions and Nanostructures #Nuclear magnetic resonance #Optics #Physics #Quantum and electron transport phenomena #Quantum mechanics #Quantum tunnelling #Resonance (particle physics) #SIGNAL (programming language) #Scanning tunneling microscope #Spin (aerodynamics) #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.100.035411
published as Phys. Rev. B 100, 035411 (2019) · 11 pages, 3 figures
arxiv created 2019/04/17 · openalex publication_date 2019/07/09 · arxiv updated 2019/07/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The recent development of all-electrical electron spin resonance (ESR) in a scanning tunneling microscope (STM) setup has opened the door to vast applications. Despite the fast-growing number of experimental works on STM-ESR, the fundamental principles remain unclear. By using a cotunneling picture, we show that the spin resonance signal can be explained as a time-dependent variation of the tunnel barrier induced by the alternating electric driving field. We demonstrate how this variation translates into the resonant frequency response of the direct current. Our cotunneling theory explains the main experimental findings. Namely, the linear dependence of the Rabi flop rate with the alternating bias amplitude, the absence of resonant response for spin-unpolarized currents, and the weak dependence on the actual atomic species.