Steady Floquet-Andreev States in Graphene Josephson Junctions

Explore the generation and measurement of steady Floquet-Andreev states in graphene Josephson junctions through a 40-minute lecture by Gil-Ho Lee from PCS Institute for Basic Science. Delve into the paradigm-shifting realm of engineering quantum states through light-matter interaction, focusing on the creation of Floquet-Bloch states in crystals. Discover how continuous microwave application overcomes the limitations of transient Floquet states produced by optical pulses, allowing for direct measurement of spectra using superconducting tunnelling spectroscopy. Examine the quantitative analysis of spectral characteristics while varying superconductor phase differences, temperature, microwave frequency, and power. Gain insights into non-equilibrium quantum states in dissipative condensed matter systems, covering topics such as band engineering, tunneling spectroscopy, Andreev Bound States, and the comparison between Tien-Gordon and Floquet models. Understand the experimental setup for microwave irradiation and its implications for future research in this cutting-edge field of condensed matter physics.

Intro
Band Engineering
Floquet-Bloch State
Floquet "Engineering"
Tunneling Spectroscopy via hBN layer
Superconducting Tunneling Spectroscopy
BTK Fitting for Tunneling Differential Conductance
Andreev Bound State (ABS)
ABS in Graphene Josephson Junction
Temperature Dependence
Energy Resolution of Tunnel Probe
Magnetic Field Dependence
Microwave Power Dependence
Theoretical Calculations
Frequency Dependence
Tien-Gordon Model v.s. Floquet Model
Improving Microwave Coupling
Summary
Experimental Setup for Microwave Irradiation