From classical to quantum glass
Abstract
We study the effects of a transverse magnetic field on the dynamics of the randomly diluted, dipolar coupled, Ising magnet LiHo0.167Y0.833F4. The transverse field mixes the eigenfunctions of the ground-state Ising doublet with the otherwise inaccessible excited-state levels. We observe a rapid decrease in the characteristic relaxation times, large changes in the spectral form of the relaxation, and a depression of the spin-glass transition temperature with the introduction of quantum fluctuations.
- Publication:
-
Physical Review Letters
- Pub Date:
- October 1991
- DOI:
- 10.1103/PhysRevLett.67.2076
- Bibcode:
- 1991PhRvL..67.2076W
- Keywords:
-
- 75.50.Lk;
- 05.30.-d;
- 75.40.Gb;
- Spin glasses and other random magnets;
- Quantum statistical mechanics;
- Dynamic properties