Evidence for a Superglass State in Solid 4He

Details Evidence for a Superglass State in Solid 4He Evidence for a Superglass State in Solid 4He

2009-04-30

arxiv.org/abs/0904.4914v1

Science 324, 632 (1 May 2009)

Physics

Condensed Matter

Other Condensed Matter

25 pages (12 main manuscript, 13 supporting material), 10 figures (4 main manuscript, 6 supporting material)

Scientific paper

10.1126/science.1169512

Although solid helium-4 (4He) may be a supersolid it also exhibits many phenomena unexpected in that context. We studied relaxation dynamics in the resonance frequency f(T) and dissipation D(T) of a torsional oscillator containing solid 4He. With the appearance of the "supersolid" state, the relaxation times within f(T) and D(T) began to increase rapidly together. More importantly, the relaxation processes in both D(T) and a component of f(T) exhibited a complex synchronized ultraslow evolution towards equilibrium. Analysis using a generalized rotational susceptibility revealed that, while exhibiting these apparently glassy dynamics, the phenomena were quantitatively inconsistent with a simple excitation freeze-out transition because the variation in f was far too large. One possibility is that amorphous solid 4He represents a new form of supersolid in which dynamical excitations within the solid control the superfluid phase stiffness.

Affiliated with

Also associated with

No associations

Rating

Evidence for a Superglass State in 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 Evidence for a Superglass State in Solid 4He, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evidence for a Superglass State in Solid 4He will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-444062