Kinetic Inductance Characterization of Thin 2H-NbSe₂ Superconductor Using Circuit Quantum Electrodynamics

Abstract

Wedeveloped hybrid superconducting microwave resonators incorporating van der Waals (vdW) superconductors to explore the microwave response of superconducting 2D materials in the GHz regime. We first established a reliable technique to contact thin NbSe₂, entirely encapsulated with hexagonal Boron Nitride (hBN), with a coplanar Al resonator. Then we fabricated hybrid Al-NbSe₂ resonators and measured the kinetic inductance of thin NbSe₂ at low-temperature and low-photon number limits. In this thesis, we discuss the observed relation between the kinetic inductance and the thickness of the thin NbSe₂. Furthermore, we characterize DC bias current, and microwave power dependence of the kinetic inductance in the hybrid Al-NbSe₂ resonators. Our approach contributes to understanding the both DCand ACproperties of superconducting 2D materials with potential implications for their utilization in emerging technologies.