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

Antti Laitinen, Jukka-Pekka Kaikkonen, Abhilash Thanniyil Sebastian, Igor Todoshchenko, Juuso Manninen, Vladislav Zavyalov, Alexander Savin, Andreas Isacsson, Pertti Hakonen (Corresponding Author)

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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 number 24LT02
Number of pages7
JournalJournal of Physics D: Applied Physics
Volume52
Issue number24
DOIs
Publication statusPublished - 4 Apr 2019
MoE publication typeA1 Journal article-refereed

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Keywords

  • graphene
  • love wave
  • shear mode
  • LOR
  • low temperatures
  • two level system

Cite this

Laitinen, A., Kaikkonen, J-P., Thanniyil Sebastian, A., Todoshchenko, I., Manninen, J., Zavyalov, V., Savin, A., Isacsson, A., & Hakonen, P. (2019). A graphene resonator as an ultrasound detector for generalized Love waves in a polymer film with two level states. Journal of Physics D: Applied Physics, 52(24), [ 24LT02]. https://doi.org/10.1088/1361-6463/ab11a9