The glassy response of double torsion oscillators in solid 4He

Matthias J. Graf, Jung-Jung Su, Hari P. Dahal, I. Grigorenko, Zohar Nussinov

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

Single and double torsion oscillators have been used to measure the anomalous change in resonant frequency and accompanying dissipation in solid 4He. We present a glass description of the mechanical anomalies found in torsion oscillator measurements. Our results show that it is not necessary to invoke a supersolid interpretation to explain these mechanical anomalies. Previously, we demonstrated that the back-action of a glassy subsystem present in solid 4He can account for frequency change and dissipation peak in single torsion oscillator experiments. Here, we show that the same glassy back-action can explain the experimental results of the composite torsion oscillator developed by the Rutgers group, which measures the response of solid 4He at the in-phase mode f 1=496 Hz and out-of-phase mode f 2=1173 Hz.

Original languageEnglish
Pages (from-to)500-508
Number of pages9
JournalJournal of Low Temperature Physics
Volume162
Issue number5-6
DOIs
StatePublished - 1 Mar 2011

Keywords

  • Glass
  • Solid helium
  • Supersolid
  • Torsion oscillator

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