Nanoelectromechanical resonators from high-T c superconducting crystals of Bi 2 Sr 2 Ca 1 Cu 2 O<IMG ALIGN=MIDDLE ALT=-8+δ

Sudhir Kumar Sahu, Jaykumar Vaidya, Felix Schmidt, Digambar Jangade, Arumugam Thamizhavel, Gary Steele, Mandar M. Deshmukh, Vibhor Singh

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Abstract

In this report, we present nanoelectromechanical resonators fabricated with thin exfoliated crystals of a high-T c cuprate superconductor Bi 2 Sr 2 Ca 1 Cu 2 O. The mechanical readout is performed by capacitively coupling their motion to a coplanar waveguide microwave cavity fabricated with a superconducting alloy of molybdenum-rhenium. We demonstrate mechanical frequency tunability with external dc-bias voltage, and quality factors up to ∼36 600. Our spectroscopic and time-domain measurements show that mechanical dissipation in these systems is limited by the contact resistance arising from resistive outer layers. The temperature dependence of dissipation indicates the presence of tunneling states, further suggesting that their intrinsic performance could be as good as other two-dimensional atomic crystals such as graphene.

Original languageEnglish
Article number025027
Number of pages8
Journal2D Materials
Volume6
Issue number2
DOIs
Publication statusPublished - 2019

Keywords

  • high-Tc cuprate superconductor
  • mechanical exfoliation
  • microwave cavity
  • Nanoelectromechanical systems
  • two-level systems

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