Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Absence of low-temperature anomaly on the melting curve of He-4.
AU - Todoshchenko, Igor A.
AU - Alles, Harry
AU - Junes, Heikko J.
AU - Parshin, Alexander Y.
AU - Tsepelin, Viktor
PY - 2007/7
Y1 - 2007/7
N2 - 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.
AB - 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.
KW - SOLID HELIUM
KW - CRYSTALS
KW - SUPERFLUIDITY
KW - HEAT
KW - MK
KW - SUPERSOLID
U2 - 10.1134/S0021364007090093
DO - 10.1134/S0021364007090093
M3 - Journal article
VL - 85
SP - 454
EP - 457
JO - JETP Letters
JF - JETP Letters
SN - 0021-3640
IS - 9
ER -