Observation of Macroscopic Structural Fluctuations in bcc Solid 4He

Details Observation of Macroscopic Structural Fluctuations in bcc Solid 4He Observation of Macroscopic Structural Fluctuations in bcc Solid 4He

2005-05-31

arxiv.org/abs/cond-mat/0505763v2

Physics

Condensed Matter

Other Condensed Matter

14 pages, 6 figure, accepted for PRB

Scientific paper

10.1103/PhysRevB.73.024301

We report neutron diffraction studies of low density bcc and hcp solid 4He. In the bcc phase, we observed a continuous dynamical behaviour involving macroscopic structural changes of the solid. The dynamical behaviour takes place in a cell full of solid, and therefore represents a solidsolid transformation. The structural changes are consistent with a gradual rotation of macroscopic grains separated by low angle grain boundaries. We suggest that these changes are triggered by random momentary vibrations of the experimental system. An analysis of Laue diffraction patterns indicates that in some cases these structural changes, once initiated by a momentary impulse, seem to proceed at a constant rate over times approaching an hour. The energy associated with these macroscopic changes appears to be on the order of kT. Under similar conditions (temperature and pressure), these effects were absent in the hcp phase.

Affiliated with

Also associated with

No associations

Rating

Observation of Macroscopic Structural Fluctuations in bcc Solid 4He 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 Observation of Macroscopic Structural Fluctuations in bcc Solid 4He, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Observation of Macroscopic Structural Fluctuations in bcc Solid 4He will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-455442