The possibility to manipulate the magnetic properties by Josephson current attracts much attention nowadays. In the present project, we plan to do a detailed investigation of spin-orbital coupling in Josephson nanojunctions. We will investigate the generation of magnetic precession by Josephson current at different values of bias current and the effect of external radiation on the character of precession. Different computer programs will be developed for modelling different types of interactions between magnetic moment and Josephson current.
Tasks
- Be familiar to quantum tunnelling phenomena.
- Gain some experience to analytical methods which used in condensed matter physics.
- How to simulate the phase dynamics of Josephson junction.
- Lear how to analyse and explain the results of the simulations.
Preliminary schedule by topics/tasks
- Week 1: Introduction to the topic of Josephson junction and reading literature.
- Week 2: Simulations for single junction.
- Week 3, 4, 5: Work on the tasks.
- Week 6: Work on the report.
Required skills
- Basic knowledge of superconductivity, and magnetism.
- C++ programing.
- Student who works with Python and COMSOL Multiphysics may have the opportunity to do additional tasks.
Acquired skills and experience
- Be familiar to Josephson junction and how to simulate its phase dynamics.
- Modeling of phase dynamics and current voltage characteristics for different types of Josephson junctions.
- Modeling of phase dynamics and current voltage characteristics for Josephson junctions with layered structure.
- Depending on the student progress we could also:
1- study the manipulation of magnetic moment in superconductor Josephson junction coupled to ferromagnet.
2- Since nanomagnetic systems have many applications in spintronic logic devices, and memory devices. We devote part of the practice to use micromagnetic simulation tools to study magnetization phenomena on the intermediate scale between the quantum mechanical scale of individual atoms and the macroscale.
Recommended literature
Yu. M. Shukrinov, Anomalous Josephson effect, Phys.-Usp. 65 317 (2022).
Yu. M. Shukrinov, et al., Appl. Phys. Lett., 110(18):182407, (2017).
