Regensburg 2022 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 71: Focus Session: Atomic-Scale Studies of Spins on Surfaces with Scanning Tunneling Microscopy 2
O 71.1: Topical Talk
Donnerstag, 8. September 2022, 15:00–15:30, S051
Theory for Electron Spin Resonance based on electron transport — •Nicolas Lorente1, José Reina2, and Christoph Wolf2 — 1Centro de Física de Materiales & DIPC, Donostia, Spain — 2Center for Quantum Nano Science, Seoul, Korea
Recent progress in electron spin resonance with the scanning tunneling microscope (ESR-STM) [1] is greatly advancing the experimental possibilities of manipulating atomic spins by all-electrical means. Two-qubit operations have been made possible using a pulse-mode in the ESR-STM [2], and addressing remote qubits has been rendered possible by creating a new muti-frequency operational mode [3]. We aim at developing a computational tool that permits us to interpret and predict the outcome of experiments in ESR. The first results of such a simulation tool have addressed one and two spins under an STM current [4,5]. We use a non-equilibrium Green's function approach with Hubbard operators that allows us to write quantum adiabatic Markovian master equations in the presence of an electron current and under the driving of an external electric field. The results are enticing and the modelling is flexible enough to treat many different physical situations. References: [1] S. Baumann et al, Science 350, 417 (2015). [2] K. Yang et al, Science 366, 509 (2019). [3] S.-H. Phark et al, ArXiv:2108.09880. [4] J. Reina et al, Phys. Rev. B 100, 035411 (2019). [5] J. Reina et al, Phys, Rev. B 104, 245435 (2021).