Title: Semiquantitative theory for high-field low-temperature properties of a distorted diamond spin chain
Author(s):

	O. Derzhko (Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine, 1 Svientsitskii St., 79011Lviv, Ukraine; Department for Theoretical Physics, Ivan Franko National University of Lviv, 12 Drahomanov St., 79005Lviv, Ukraine; Institut für theoretische Physik, Universität Magdeburg, P.O. Box 4120, D-39016 Magdeburg, Germany),
	J. Richter (Institut für theoretische Physik, Universität Magdeburg, P.O. Box 4120, D-39016 Magdeburg, Germany),
	O. Krupnitska (Department for Theoretical Physics, Ivan Franko National University of Lviv, 12 Drahomanov St., 79005Lviv, Ukraine)

We consider the antiferromagnetic Heisenberg model on a distorted diamond chain and use the localized-magnon picture adapted to a distorted geometry to discuss some of its high-field low-temperature properties. More specifically, in our study we assume that the partition function for a slightly distorted geometry has the same form as for ideal geometry, though with slightly dispersive one-magnon energies. We also discuss the relevance of such a description to azurite.

Key words: diamond spin chain, localized magnons, azurite
PACS: 75.10.Jm

Full text [pdf, ps]

<< List of papers