Article Superconducting Cavity-Based Sensing of Band Gaps in 2D Materials

Krishnendu Maji ; Joydip Sarkar ; Supriya Mandal ; Sriram H. ; Mahesh Hingankar ; Ayshi Mukherjee ; Soumyajit Samal ; Anirban Bhattacharjee ; Meghan P. Patankar ; Kenji Watanabe SAMURAI ORCID (National Institute for Materials Science) ; Takashi Taniguchi SAMURAI ORCID (National Institute for Materials Science) ; Mandar M. Deshmukh

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Krishnendu Maji, Joydip Sarkar, Supriya Mandal, Sriram H., Mahesh Hingankar, Ayshi Mukherjee, Soumyajit Samal, Anirban Bhattacharjee, Meghan P. Patankar, Kenji Watanabe, Takashi Taniguchi, Mandar M. Deshmukh. Superconducting Cavity-Based Sensing of Band Gaps in 2D Materials. Nano Letters. 2024, 24 (15), 4369-4375. https://doi.org/10.1021/acs.nanolett.3c04990

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(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 has been 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 moiré, where DC transport measurement is challenging.

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  • In Copyright

    This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters, copyright © 2024 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.nanolett.3c04990.

Keyword: Superconducting cavity, 2D materials, Bilayer graphene, Microwave, Capacitance

Date published: 2024-04-17

Publisher: American Chemical Society (ACS)

Journal:

  • Nano Letters (ISSN: 15306984) vol. 24 issue. 15 p. 4369-4375

Funding:

  • Japan Society for the Promotion of Science JP20H00354
  • J.C. Bose Fellowship from the Department of Science and Technology of India JCB/2022/000045
  • Department of Atomic Energy, Government of India 12-R&D-TFR-5.10-0100
  • Ministry of Education, Culture, Sports, Science and Technology JPMXP0112101001
  • Mission on Nano Science and Technology SR/NM/NS-45/2016
  • Department of Science and Technology, Ministry of Science and Technology, India SPR/2019/001247
  • Japan Society for the Promotion of Science 19H05790

Manuscript type: Author's version (Accepted manuscript)

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First published URL: https://doi.org/10.1021/acs.nanolett.3c04990

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Updated at: 2025-07-24 08:30:25 +0900

Published on MDR: 2025-07-24 08:18:22 +0900

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