Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2008-10-14
EPL, 87 (2009) 57010
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
as published in EuroPhys Letters
Scientific paper
10.1209/0295-5075/87/57010
A characteristic of spin reversal in the presence of phonon-bottleneck is the deviation of the magnetization cycle from a reversible function into an opened hysterezis cycle. In recent experiments on molecular magnets (e.g. V$_{15}$ and Ru$_2$), the zero-field level repulsion was sufficiently large to ensure an otherwise adiabatic passage through zero-field and the magnetization curves can be described by using only a phonon-bottleneck model. Here, we generalize the phonon-bottleneck model into a model able to blend the non-adiabatic dynamics of spins with the presence of a non-equilibrium phonon bath. In this simple phenomenological model, Bloch equations are written in the eigenbasis of the effective spin Hamiltonian, considered to be a two-level system at low temperatures. The relaxation term is given by the phonon-bottleneck mechanism. To the expense of calculus time, the method can be generalized to multi-level systems, where the notion of Bloch sphere does not apply but the density matrix formalism is still applicable.
Chen Leon L.
Chiorescu Irinel
No associations
LandOfFree
Coherent spin rotation in the presence of a phonon-bottleneck effect 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 Coherent spin rotation in the presence of a phonon-bottleneck effect, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coherent spin rotation in the presence of a phonon-bottleneck effect will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-591775