Electric response induced by second sound in superfluid helium

Hideki Yayama, Yugo Nishimura, Hiroka Uchiyama, Hiroshi Kawai, Jean Paul van Woensel, Ali G. Hafez

Research output: Contribution to journalArticleAcademicpeer-review

2 Citations (Scopus)

Abstract

The electric response of superfluid helium was measured when a second sound standing wave was generated in a resonator cavity. The results were qualitatively in agreement with that of other research laboratories, but the normalized signal strength was one order of magnitude larger reflecting the difference in electrode structure. The temporal phase difference between the electric oscillation and the temperature oscillation was measured and compared with the analysis. The result excluded a hypothesis that the electric response was induced by the velocities of the relative motion of normal and superfluid components of liquid helium. We suggested a hypothetical explanation of the electric response based on the oscillation of chemical potential of electrons in helium atoms. The effect of an external dc electric field was examined and no effect was observed. The heater power dependence of the temperature oscillation and the electric oscillation showed the qualitative agreement with the original experiment.

Original languageEnglish
Pages (from-to)1386–1393
Number of pages8
JournalFizika Nizkikh Temperatur
Volume44
Issue number10
Publication statusPublished - 1 Oct 2018

Fingerprint

helium
oscillations
acoustics
helium atoms
cavity resonators
standing waves
heaters
liquid helium
temperature
electrodes
electric fields
electrons

Keywords

  • Electric activity
  • Electric response
  • Resonance
  • Second sound
  • Superfluid helium

Cite this

Yayama, H., Nishimura, Y., Uchiyama, H., Kawai, H., van Woensel, J. P., & Hafez, A. G. (2018). Electric response induced by second sound in superfluid helium. Fizika Nizkikh Temperatur, 44(10), 1386–1393.
Yayama, Hideki ; Nishimura, Yugo ; Uchiyama, Hiroka ; Kawai, Hiroshi ; van Woensel, Jean Paul ; Hafez, Ali G. / Electric response induced by second sound in superfluid helium. In: Fizika Nizkikh Temperatur. 2018 ; Vol. 44, No. 10. pp. 1386–1393.
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Yayama, H, Nishimura, Y, Uchiyama, H, Kawai, H, van Woensel, JP & Hafez, AG 2018, 'Electric response induced by second sound in superfluid helium', Fizika Nizkikh Temperatur, vol. 44, no. 10, pp. 1386–1393.

Electric response induced by second sound in superfluid helium. / Yayama, Hideki; Nishimura, Yugo; Uchiyama, Hiroka; Kawai, Hiroshi; van Woensel, Jean Paul; Hafez, Ali G.

In: Fizika Nizkikh Temperatur, Vol. 44, No. 10, 01.10.2018, p. 1386–1393.

Research output: Contribution to journalArticleAcademicpeer-review

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T1 - Electric response induced by second sound in superfluid helium

AU - Yayama, Hideki

AU - Nishimura, Yugo

AU - Uchiyama, Hiroka

AU - Kawai, Hiroshi

AU - van Woensel, Jean Paul

AU - Hafez, Ali G.

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N2 - The electric response of superfluid helium was measured when a second sound standing wave was generated in a resonator cavity. The results were qualitatively in agreement with that of other research laboratories, but the normalized signal strength was one order of magnitude larger reflecting the difference in electrode structure. The temporal phase difference between the electric oscillation and the temperature oscillation was measured and compared with the analysis. The result excluded a hypothesis that the electric response was induced by the velocities of the relative motion of normal and superfluid components of liquid helium. We suggested a hypothetical explanation of the electric response based on the oscillation of chemical potential of electrons in helium atoms. The effect of an external dc electric field was examined and no effect was observed. The heater power dependence of the temperature oscillation and the electric oscillation showed the qualitative agreement with the original experiment.

AB - The electric response of superfluid helium was measured when a second sound standing wave was generated in a resonator cavity. The results were qualitatively in agreement with that of other research laboratories, but the normalized signal strength was one order of magnitude larger reflecting the difference in electrode structure. The temporal phase difference between the electric oscillation and the temperature oscillation was measured and compared with the analysis. The result excluded a hypothesis that the electric response was induced by the velocities of the relative motion of normal and superfluid components of liquid helium. We suggested a hypothetical explanation of the electric response based on the oscillation of chemical potential of electrons in helium atoms. The effect of an external dc electric field was examined and no effect was observed. The heater power dependence of the temperature oscillation and the electric oscillation showed the qualitative agreement with the original experiment.

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Yayama H, Nishimura Y, Uchiyama H, Kawai H, van Woensel JP, Hafez AG. Electric response induced by second sound in superfluid helium. Fizika Nizkikh Temperatur. 2018 Oct 1;44(10):1386–1393.