1 - 10 of 113 articles
The importance of spin fluctuations on the physical properties of liquid
He can be probed by studying the polarization dependence of its magnetic susceptibility and viscosity. We discuss the present state of two such experiments. Using the rapid melting technique, to strongly polarize liquid...
The superfluid transition in submonolayer and monolayer
He films and
He mixture films on solid H
has been studied using a quartz crystal microbalance technique. Kosterlitz-Thouless (KT) transitions were observed in submonolayer
He films with density greater than 0.062 ± 0.002 Å...
We have investigated numerically the motion and the stability of quantized vortex knots.
We have injected R
rotons into superfluid
He at low temperatures (0.05K
Pricaupenko and Treiner
predicted a small but non-negligible temperature dependence of the surface tension between liquid helium and cesium. However, when the effects of bulk phonons in both liquid and solid are taken into account, the temperature dependence is found to be significantly...
We present ab initio calculations of the adsorption potentials V(Z) of inert gases and hydrogen on the surfaces of various metals. The ratio of the adsorption well depth to that of the adsorbate pair potential is ∼ 3.5, 2, 1.5, 1, 0.9 and 0.9 for adsorption on Mg, Li, Na, K, Rb, and Cs,...
We describe a technique for performing high resolution calorimetry on samples with very small heat capacity (∼10μJ/K). This involves using ac calorimetry, in which the sample is subjected to temperature oscillations, with simultaneous dc regulation of the average temperature. This method works...
Raman and infrared vibrational spectra of H
have been measured to pressures in excess of 200 GPa and at liquid helium temperatures using new high sensitivity techniques. Detailed study of the pressure dependence of o-p conversion rate reveals an initial increase followed by a decrease above 1...
We describe a new resonance of superfluid
He when confined in a superleak. In our experiment the superleak is sealed except at a filling hole which communicates with bulk liquid. The resonance is driven and detected thermally. The restoring force is provided by the compressibility of the...
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