Excitations in confined helium

Details Excitations in confined helium Excitations in confined helium

2003-05-09

arxiv.org/abs/cond-mat/0305223v1

Physics

Condensed Matter

Phys. Rev. B (2003, in press)

Scientific paper

10.1103/PhysRevB.67.184304

We design models for helium in matrices like aerogel, Vycor or Geltech from a manifestly microscopic point of view. For that purpose, we calculate the dynamic structure function of 4He on Si substrates and between two Si walls as a function of energy, momentum transfer, and the scattering angle. The angle--averaged results are in good agreement with the neutron scattering data; the remaining differences can be attributed to the simplified model used here for the complex pore structure of the materials. A focus of the present work is the detailed identification of coexisting layer modes and bulk--like excitations, and, in the case of thick films, ripplon excitations. Involving essentially two--dimensional motion of atoms, the layer modes are sensitive to the scattering angle.

Affiliated with

Also associated with

No associations

Rating

Excitations in confined helium does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Excitations in confined helium, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Excitations in confined helium will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-155011