Collective Excitations in Concentrated Mn2+ Systems: Special Properties
The spectroscopic properties of such Mn2+ systems as MnF2, RbMnF3, and KMnF3 have been widely investigated over the past fifteen years or so. An important step in the understanding of these systems has been the realization of the role of collective excitations in determining these properties. In this article, the relationship between collective excitations and spectral features is explored. We begin with a description of the Mn2+ ion in a crystal and a discussion of its participation in collective excitations. Next, we briefly consider the magnetic properties of the crystals of interest here. Subsequent sections deal with excitons, magnons, and to a lesser extent phonons with particular attention to their effects on the optical properties of concentrated Mn systems.
KeywordsCollective Excitation Spin Excitation Exciton Line Sideband Transition Transfer Matrix Element
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