A graphene resonator as an ultrasound detector for generalized Love waves in a polymer film with two level states

Antti Laitinen, Jukka-Pekka Kaikkonen, Thanniyil S. Abhilash, Igor Todoshchenko, Juuso Manninen, Vladislav Zavyalov, Alexander Savin, Andreas Isacsson, Pertti J. Hakonen*

*Corresponding author for this work

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Abstract

We have investigated surface shear waves at 22 MHz in a 0.5 micron thick polymer film on a SiO2/Si substrate at low temperatures using suspended and non-suspended graphene as detectors. By tracking ultrasound modes detected by oscillations of a trilayer graphene membrane both in vacuum and in helium superfluid, we assign the resonances to surface shear modes, generalized Love waves, in the resist/silicon-substrate system loaded with gold. The propagation velocity of these shear modes displays a logarithmic temperature dependence below 1 K, which is characteristic for modification of the elastic properties of a disordered solid owing to a large density of two level state systems. For the dissipation of the shear mode, we find a striking logarithmic temperature dependence, which indicates a basic relation between the speed of the surface wave propagation and the mode dissipation.

Original languageEnglish
Article number24LT02
Pages (from-to)1-7
Number of pages7
JournalJournal of Physics D - Applied Physics
Volume52
Issue number24
DOIs
Publication statusPublished - 4 Apr 2019
MoE publication typeA1 Journal article-refereed

Keywords

  • graphene
  • Love wave
  • shear mode
  • LOR
  • low temperatures
  • two level system
  • TUNNELING-STATES
  • GLASSES
  • LAYER

Projects

EMP: European Microkelvin Platform

Hakonen, P.

01/01/201930/06/2023

Project: EU: Framework programmes funding

BOLOSO: Ultrasensitive bolometers for security applications

Tomi, M., Hakonen, P., Suresh, K. & Korkalainen, T.

01/01/201831/12/2021

Project: Academy of Finland: Other research funding

1/f noise

Thanniyil Sebastian, A., Will, M., Hakonen, P. & Sarkar, J.

01/09/201731/08/2021

Project: Academy of Finland: Other research funding

Equipment

OtaNano

Anna Rissanen (Manager)

Aalto University

Facility/equipment: Facility

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