Superconducting Cavity-Based Sensing of Band Gaps in 2D Materials
Abstract
The superconducting coplanar waveguide (SCPW) cavity plays an essential role in various areas like superconducting qubits, parametric amplifiers, radiation detectors, and studying magnon-photon and photon-phonon coupling. Despite its wide-ranging applications, the use of SCPW cavities to study various van der Waals 2D materials is relatively unexplored. The resonant modes of the SCPW cavity exquisitely sense the dielectric environment. In this work, we measure the charge compressibility of bilayer graphene coupled to a half-wavelength SCPW cavity. Our approach provides a means to detect subtle changes in the capacitance of the bilayer graphene heterostructure, which depends on the compressibility of bilayer graphene, manifesting as shifts in the resonant frequency of the cavity. This method holds promise for exploring a wide class of van der Waals 2D materials, including transition metal dichalcogenides (TMDs) and their moir\'e where DC transport measurement is challenging.
Keywords
Cite
@article{arxiv.2403.05867,
title = {Superconducting Cavity-Based Sensing of Band Gaps in 2D Materials},
author = {Krishnendu Maji and Joydip Sarkar and Supriya Mandal and Sriram H. and Mahesh Hingankar and Ayshi Mukherjee and Soumyajit Samal and Anirban Bhattacharjee and Meghan P. Patankar and Kenji Watanabe and Takashi Taniguchi and Mandar M. Deshmukh},
journal= {arXiv preprint arXiv:2403.05867},
year = {2024}
}