Physics – Condensed Matter – Materials Science
Scientific paper
2005-11-03
Phys. Rev. B 74, 024302 (2006)
Physics
Condensed Matter
Materials Science
12 pages, 9 figures
Scientific paper
10.1103/PhysRevB.74.024302
We discuss the problem of proton motion in Hydrogen bond materials with special focus on ice. We show that phenomenological models proposed in the past for the study of ice can be recast in terms of microscopic models in close relationship to the ones used to study the physics of Mott-Hubbard insulators. We discuss the physics of the paramagnetic phase of ice at 1/4 filling (neutral ice) and its mapping to a transverse field Ising model and also to a gauge theory in two and three dimensions. We show that H3O+ and HO- ions can be either in a confined or deconfined phase. We obtain the phase diagram of the problem as a function of temperature T and proton hopping energy t and find that there are two phases: an ordered insulating phase which results from an order-by-disorder mechanism induced by quantum fluctuations, and a disordered incoherent metallic phase (or plasma). We also discuss the problem of decoherence in the proton motion introduced by the lattice vibrations (phonons) and its effect on the phase diagram. Finally, we suggest that the transition from ice-Ih to ice-XI observed experimentally in doped ice is the confining-deconfining transition of our phase diagram.
Castro Neto Antonio H.
Fradkin Eduardo
Pujol Pierre
No associations
LandOfFree
Ice: a strongly correlated proton system 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 Ice: a strongly correlated proton system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ice: a strongly correlated proton system will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-58472