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Showing 1 to 11 of 11 for “"solid helium"”.
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Superglass Dynamics Of Solid Helium
Although solid 4 He may be a supersolid, it also exhibits many phenomena unexpected in that context. In order to measure the finely resolved time-dependent inertial response of this exotic quantum material, we constructed a vibrationallyisolated millikelvin cryostat with automated data acquisition …
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Thermal vacancies in solid helium-3
Thermal vacancy concentrations in crystals of 3He have been determined from high precision measurements of the tem3 perature dependence of the x-ray lattice parameter. Bcc He 3 was studied for molar volumes ranging from 20.3 to 24.8 cm ; mole for which the melting temperatures range from 2.36 to …
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Thermodynamic properties of solid helium using an anharmonic anisotropic continuum model
Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-20T21:45:10Z No. of bitstreams: 1 1980_berker.pdf: 2694478 bytes, checksum: b2290d8a1d4c61c040e39e82cedd56e9 (MD5)
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Application of Compressional Cooling to the Study of Nuclear Ordering in Solid Helium-3
Made available in DSpace on 2015-05-12T21:41:57Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7020988.PDF: 5452214 bytes, checksum: 64f6456cf2656190e7bb7fde3e0e9be6 (MD5) Previous issue date: 1970
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Application of compressional cooling to the study of nuclear ordering in solid helium three
… used to observe ordering of the nuclear spins in solid He3 He3 atoms in the solid are localized at lattice sites. Interactions between neighboring atoms, due to zero point motion, are relatively small until temperatures in the low I millidegree Kelvin range are reached. Liquid He 3 is a Fermi …
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Path Integral Monte Carlo Simulations of Helium: From Superfluid Droplets to Quantum Crystals
… we have calculated the Deybe-Waller factor in solid helium for a range of temperatures and densities, and compared the scaling behavior with the predictions of harmonic theory. The first non-Gaussian contribution to the density distribution was calculated.
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Emergent Critical Properties in Liquid-Gas Transition and Single Dislocations in Solid He4
… a quantum topological defect (dislocation) in solid Helium-4. The unifying theme, though, is <em>Emergence</em> - the appearance of unexpected qualities at large distance and time scales in these systems. Our results resolve the long standing controversy about the nature of the liquid-gas …
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Effect of high pressure on the Fermi surfaces of zinc and aluminum
… de Haasvan Alphen oscillations and by using solid helium as a pressure medium. The primary result obtained in the study of zinc was that the (0001) cross section of the needle portion of the Fermi surface doubled at 3 kbar. This observed behavior is qualitatively in agreement with predictions …
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Path Integral Monte Carlo Simulations of Helium: From Superfluid Droplets to Quantum Crystals
… are manifested in microscopic, inhomogeneous helium systems. Path Integral Monte Carlo is a powerful method for calculating the equilibrium properties of quantum systems at finite temperature. We have achieved linear scaling of computer time with number of particles through the use of neighbor …
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A study of superconducting lead-indium alloys subjected to hydrostatic pressure using the electron tunneling technique
… in a beryllium-copper pressure cell and solid helium provided nearly hydrostatic pressure. Pressure was applied with the helium in the gaseous state and solidification took place at constant pressure. Zero pressure data was in good agreement with previously published results.</p> <p>The …
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Momentum density of hcp and liquid helium-4 by inelastic neutron scattering
Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-08T16:10:35Z No. of bitstreams: 1 1983_hilleke.pdf: 5067231 bytes, checksum: d2a10e07e8841e9e47edb13560536a33 (MD5)