A ug 2 00 1 1 Quantum Tunneling in Half-Integer Spin Systems

Motivated by the experimental observations of resonant tunnelings in the systems with half-integer spin, such as V15 and Mn4, we study the mechanism of adiabatic change of the magnetization in systems with the time-reversal symmetry. Within the time-reversal symmetric models, effects of several types of perturbations are investigated. Although tunneling… CONTINUE READING