报告题目：Unveiling the driving field in all-electric Electron Spin Resonance: an exchange field approach

报告人：Dr. Jose Reina-Galvez

邀请人：张雪 教授

时间：2024年5月15日 11:00 - 11:30

地点：广州国际校区 C2a-207

欢迎广大师生踊跃参加。

自旋科技研究院

2024年5月13日

报告摘要：

Understanding the coherent properties of driven electron spins is crucial for their potential application in quantum-coherent nanoscience. In this talk, we address the origin of the driving field for all-electric electron spin resonance in the case of a quantum impurity connected to polarized leads under radio frequency voltage by using an Anderson impurity model. Mapping the quantum master equation into a system of equations for the impurity spin allows us to identify two distinct driving mechanisms: a magnetically exchange-driven ESR and a spin-torque. This last one closely associated with the DC current and the accumulated spin.

报告人简介：

Jose Reina-Galvez, Postdoctoral Researcher at the group of Theory of Quantum Systems at Surfaces at Center for Quantum Nanoscience (QNS), EWHA WOMANS University.

I am currently working on modelating ESR/STM experiments at QNS. The method used consists in implementing a Floquet Green’s Function technique to a standard Anderson impurity Hamiltonian with a spin structure. This allows us to find a master equation for the reduced density matrix which can be solved algebraically so we can potentially compute any desirable observable.

Work experience:

2021 – Current: Postdoctoral researcher at Center for Quantum Nanoscience(QNS), Institute for Basic Science(IBS), EWHA WOMANS University, Seoul, Korea

2017 – 2021: PhD in theoretical studies on single atom electron spin resonance at Materials Physics Centre (CSIC), San Sebastian, Spain