@inproceedings{5fcc9668dadb49039f7c8853acb7dd61,
title = "Search of superfluidity of solid 4He in a porous Vycor glass by means of the ultrasound technique",
abstract = "Kim and Chan have reported that solid 4He shows a reduction of the rotational moment of inertia below 0.2 K, which suggests an onset of superfluidity. Ultrasound should be sensitive to mass decoupling caused by superfluidity. If a superfluid component exists, the sound velocity of a porous material filled with solid 4He could increase. We have carried out ultrasonic measurements for a porous Vycor glass filled with solid 4He. Since the reported {"}critical velocity{"} is very low, we have adopted a continuous wave resonance technique which realizes the oscillating velocity less than 1 × 10-7 m/s. The resolution of the sound velocity is 10-5 for small oscillating velocities, and is enough to detect the expected mass decoupling. Although the present experimental conditions are rather limited, no signature of supersolid has been observed.",
keywords = "Supersolid, Ultrasound, Vycor glass",
author = "T. Kobayashi and S. Fukazawa and J. Taniguchi and M. Suzuki and K. Shirahama",
year = "2006",
month = dec,
day = "1",
doi = "10.1063/1.2354723",
language = "English",
isbn = "0735403473",
series = "AIP Conference Proceedings",
pages = "333--334",
booktitle = "LOW TEMPERATURE PHYSICS",
note = "LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24 ; Conference date: 10-08-2006 Through 17-10-2006",
}