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Absence of low-temperature anomaly on the melting curve of He-4.

Todoshchenko, Igor A. and Alles, Harry and Junes, Heikko J. and Parshin, Alexander Y. and Tsepelin, Viktor (2007) Absence of low-temperature anomaly on the melting curve of He-4. JETP LETTERS, 85 (9). pp. 454-457. ISSN 0021-3640

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Abstract

The melting pressure and pressure in the liquid at a constant density of ultrapure He-4 (0.3 ppb of He-3 impurities) have been measured with an accuracy of about 0.5 mu bar in the temperature range from 10 to 320 mK. The measurements show that the anomaly on the melting curve below 80 mK, which was recently observed [I. A. Todoshchenko et al., Phys. Rev. Lett. 97, 165302 (2006)], is entirely due to an anomaly in the elastic modulus of Be-Cu from which our pressure gauge is made. Thus, the melting pressure of He-4 follows the T-4 law due to phonons in the whole temperature range from 10 to 320 mK without any attribute of a supersolid transition.

Item Type: Article
Journal or Publication Title: JETP LETTERS
Uncontrolled Keywords: SOLID HELIUM ; CRYSTALS ; SUPERFLUIDITY ; HEAT ; MK ; SUPERSOLID
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 23519
Deposited By: Dr Richard P. Haley
Deposited On: 03 Feb 2009 09:27
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 16:11
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/23519

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