Magnetostatic modes in highly polarized solid helium-three

HELIUM , SOLID 1 Helium , Solid

Helium was first solidified at the famous Kamerlingh Onnes low-temperature physics laboratories in Leiden by W. H. Keesom [1] on June 25, 1926. The initial experiments by Sir Francis Simon at Oxford University and by Keesom and their collaborators focused on the melting curve, the specific heat, and the thermal conductivity of solid helium as a test of our early understanding of solids. These m...

First-principles modeling of three-body interactions in highly compressed solid helium

We present a new set of three-body interaction models based on the Slater-Kirkwood (SK) potential that are suitable for the study of the energy, structural and elastic properties of solid He at high pressure. Our effective three-body potentials are obtained from the fit to total energies and atomic forces computed with the van der Waals density functional theory method due to Grimme, and repres...

Superflow in Solid Helium

The small mass and significant zero point motion of solid He make it very different from its conventional counterparts. In the seventies it was suggested that at very low temperatures solid helium might flow like a superfluid while remaining a crystal. This hidden “supersolid” phase was subsequently almost ruled out both by experiments and theoretical calculations. However, in 2004 Kim and Chan...

Impulse Approximation in Solid Helium

The incoherent dynamic form factor S/Q , to) is evaluated in solid helium for comparison with the impulse approximation (IA). The purpose is to determine the Q values for which the IA is valid for systems such as helium where the atoms interact via a potential having a steeply repulsive but not infinite hard core. For 3He, Si(Q, to) is evaluated from first principles, beginning with the pair po...

Superfluidity in Solid Helium-4