Extremely High Frequency Dependence of Two-Dimensional Superfluid Onset
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- Hieda Mitsunori
- Department of Physics, Nagoya University
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- Matsuda Kenji
- Department of Physics, Nagoya University
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- Kato Tsuyoshi
- Department of Physics, Nagoya University
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- Matsushita Taku
- Department of Physics, Nagoya University
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- Wada Nobuo
- Department of Physics, Nagoya University
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説明
We observed the frequency dependence of the superfluid transition of 4He films adsorbed on planar gold up to a very high frequency of 180 MHz, using the overtone harmonic modes of a quartz crystal microbalance. The superfluid onset was observed at a temperature markedly higher than the Kosterlitz–Thouless (KT) transition temperature, the onset temperature in the low-frequency limit. The observed frequency dependence is surprisingly well reproduced by the dynamic theory close to the high-frequency condition where the vortex diffusion length in a period becomes as small as the vortex core diameter. We also observed that the superfluid vortex parameters depend strongly on the kind of substrate as well as on 4He film thickness.
収録刊行物
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 78 (3), 033604-033604, 2009
一般社団法人 日本物理学会
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詳細情報 詳細情報について
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- CRID
- 1390282679173264128
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- NII論文ID
- 130005437342
- 210000107694
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- ISSN
- 13474073
- 00319015
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- 本文言語コード
- en
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- データソース種別
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- JaLC
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- CiNii Articles
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