Nonlinear acoustic spectroscopy on the real squashing collective mode in 3He-B

H. Alles*, A. V. Babkin, A. J. Manninen, K. Torizuka, J. P. Pekola

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

Abstract

We have excited the real squashing (RSQ) collective modes in 3He-B with two simultaneous ultrasound pulses, yielding two-phonon absorption (TPA). We also detected TPA using single-frequency high-intensity sound pulses. The Zeeman splitting of the parametrically excited RSQ mode has been demonstrated. We checked the dispersion relations of the J=2+ modes in zero magnetic field and extracted the collective mode velocities directly from experiments.

Original languageEnglish
Pages (from-to)755-756
Number of pages2
JournalPhysica B: Condensed Matter
Volume194-196
Issue numberPart 1
DOIs
Publication statusPublished - 2 Feb 1994
MoE publication typeA1 Journal article-refereed

Keywords

  • collective modes
  • superfluid 3He
  • ultrasound

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