Spin tunnelling: a perturbative approach
- 1 January 1991
- journal article
- Published by IOP Publishing in Journal of Physics A: General Physics
- Vol. 24 (2) , L61-L62
- https://doi.org/10.1088/0305-4470/24/2/002
Abstract
It is shown that the tunnelling splitting of the energy levels of the easy-axis spin system in a small transverse magnetic field can be calculated perturbationally for arbitrary S. The results are exact, in contrast to those obtained previously in the same limit by indirect and rather difficult methods.Keywords
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