Crossover from thermal hopping to quantum tunneling in Mn_{12}Ac

Details Crossover from thermal hopping to quantum tunneling in Mn_{12}Ac Crossover from thermal hopping to quantum tunneling in Mn_{12}Ac

1999-03-10

arxiv.org/abs/cond-mat/9903174v1

Phys. Rev. B 59, 6309(1999)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

10 pages, 3 figures

Scientific paper

10.1103/PhysRevB.59.6309

The crossover from thermal hopping to quantum tunneling is studied. We show that the decay rate $\Gamma$ with dissipation can accurately be determined near the crossover temperature. Besides considering the Wentzel-Kramers-Brillouin (WKB) exponent, we also calculate contribution of the fluctuation modes around the saddle point and give an extended account of a previous study of crossover region. We deal with two dangerous fluctuation modes whose contribution can't be calculated by the steepest descent method and show that higher order couplings between the two dangerous modes need to be taken into considerations. At last the crossover from thermal hopping to quantum tunneling in the molecular magnet Mn_{12}Ac is studied.

Affiliated with

Also associated with

No associations

Rating

Crossover from thermal hopping to quantum tunneling in Mn_{12}Ac 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 Crossover from thermal hopping to quantum tunneling in Mn_{12}Ac, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Crossover from thermal hopping to quantum tunneling in Mn_{12}Ac will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-267090