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Preliminary Report: Heat Pulse Propagation in Solid 4He up to 56 bar Between 40 and 500 mK

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Abstract

Heat pulse propagation in the solid 4He has been studied between 40 and 500 mK. Response to heat pulses are detected by a titanium film superconducting transition edge bolometer. Crossover behavior from second sound in normal solid above 500 mK to ballistic propagation below 200 mK is observed. Detailed study is made to search for possible modification of this propagation behavior by the appearance of supersolidity. It is found, that the ballistic phonon propagation velocity remains constant, within 0.3% scatter of data, below 100 mK at all pressures measured between 25 and 56 bar. The temporal evolution of the detected pulse shape has not revealed any anomaly below 200 mK.

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Authors and Affiliations

  1. Serin Physics Laboratory, Rutgers University, Piscataway, NJ, 08854, USA

    Yuki Aoki & Harry Kojima

  2. Department of Physics, Pennsylvania State University, University Park, PA, 16802, USA

    Xi Lin

Authors
  1. Yuki Aoki
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  2. Xi Lin
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  3. Harry Kojima
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Correspondence to Yuki Aoki.

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Aoki, Y., Lin, X. & Kojima, H. Preliminary Report: Heat Pulse Propagation in Solid 4He up to 56 bar Between 40 and 500 mK. J Low Temp Phys 148, 659–664 (2007). https://doi.org/10.1007/s10909-007-9489-4

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  • DOI: https://doi.org/10.1007/s10909-007-9489-4

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