Localized-magnon states in strongly frustrated quantum spin lattices

• Veröffentlicht in: Физика низких температур
• Datum: 2005
• 1. Verfasser: Richter, J.
• Format: Artikel
• Sprache: Englisch
• Veröffentlicht: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2005
• Schlagworte: К семидесятилетию антиферромагнетизма
• Online Zugang: https://nasplib.isofts.kiev.ua/handle/123456789/121688
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Zitieren: Localized-magnon states in strongly frustrated quantum
 spin lattices / J. Richter // Физика низких температур. — 2005. — Т. 31, № 8-9. — С. 918-928. — Бібліогр.: 67 назв. — англ.

Recent developments concerning localized-magnon eigenstates in strongly frustrated spin lattices
 and their effect on the low-temperature physics of these systems in high magnetic fields are
 reviewed. After illustrating the construction and the properties of localized-magnon states we describe
 the plateau and the jump in the magnetization process caused by these states. Considering
 appropriate lattice deformations fitting to the localized magnons we discuss a spin-Peierls instability
 in high magnetic fields related to these states. Last but not least we consider the degeneracy of
 the localized-magnon eigenstates and the related thermodynamics in high magnetic fields. In particular,
 we discuss the low-temperature maximum in the isothermal entropy versus field curve and
 the resulting enhanced magnetocaloric effect, which allows efficient magnetic cooling from quite
 large temperatures down to very low ones.