2018/06/30 by Alexey M. Shakirov, A. N. Rubtsov, Alexey N. Rubtsov +1 · 22 citations
Biochemistry, Genetics and Molecular Biology · Chemistry · Engineering · Materials Science · Physics and Astronomy · #Amplitude #Atom (system on chip) #Atomic physics #Chemistry #Condensed matter physics #Coupling (piping) #Current (fluid) #Electron Spin Resonance Studies #Magnetism in coordination complexes #Materials science #Molecular Junctions and Nanostructures #Nuclear magnetic resonance #Paramagnetism #Physics #Quantum mechanics #Resonance (particle physics) #Spin (aerodynamics) #Thermodynamics #Torque #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.99.054434
published in Physical review. B./Physical review. B 99(5) (American Physical Society) · 7 pages, 4 figures
openalex publication_date 2019/02/28 · arxiv created 2019/03/04 · arxiv updated 2019/03/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We show how the spin-transfer torque generated by an ac voltage may be used to excite a paramagnetic resonance of an atomic spin deposited on a metallic surface. This mechanism is independent of the environment of the atom and may explain the ubiquity of the paramagnetic resonance reported by Baumann et al. [S. Baumann, W. Paul, T. Choi, C. P. Lutz, A. Ardavan, and A. J. Heinrich, Science 350, 417 (2015)]. The current and spin dynamics are modeled by a time-dependent Redfield master equation generalized to account for the periodic driven voltage. Our approach shows that the resonance effect is a consequence of the nonlinearity of the coupling between the magnetic moment and the spin-polarized current which generates a large second-harmonic amplitude that can be measured in the current signal.