Melting Curve of {sup 4}He: No Sign of a Supersolid Transition down to 10 mK

Journal Article · Fri Oct 20 00:00:00 EDT 2006 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.97.165302· OSTI ID:20861024

Todoshchenko, I A; Alles, H; Bueno, J; Junes, H J; Parshin, A Ya; Tsepelin, V ^[1]

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1. Low Temperature Laboratory, Helsinki University of Technology, P.O. Box 2200, FIN-02015 HUT (Finland)

We have measured the melting curve of {sup 4}He in the temperature range from 10 to 400 mK with the accuracy of about 0.5 {mu}bar. Crystals of different quality show the expected T{sup 4} dependence in the range from 80 to 400 mK without any sign of the supersolid transition, and the coefficient is in excellent agreement with available data on the sound velocity in liquid {sup 4}He and on the Debye temperature of solid {sup 4}He. Below 80 mK, we have observed a small deviation from T{sup 4} dependence, which, however, cannot be attributed to the supersolid transition, because instead of decrease the entropy of the solid rather remains constant, about 2.5x10{sup -6} R.

• OSTI ID: 20861024
• Journal Information: Physical Review Letters, Vol. 97, Issue 16; Other Information: DOI: 10.1103/PhysRevLett.97.165302; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ACCURACY
CRYSTALS
DEBYE TEMPERATURE
ENTROPY
HELIUM 4
LIQUIDS
MELTING
SOLIDS
SOUND WAVES
TEMPERATURE RANGE 0000-0013 K