Distortion of frustrated spin cluster caused by quantum fluctuation due to magneto-elastic coupling

We study the effects of magneto-elastic coupling on frustrated spin states of the antiferromagnetic Heisenberg model on a regular triangle and tetrahedron made of spin 1/2 or 1. Displacement of spin is considered as a quantum-mechanical variable. Distortion of clusters occurs through quantum fluctua...

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Veröffentlicht in:	Journal of physics. Condensed matter 2007-04, Vol.19 (14), p.145261-145261 (6)
Hauptverfasser:	Terao, Kiyosi, Honda, Ikumi
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: electronic structure, electrical, magnetic, and optical properties Exact sciences and technology General theory and models of magnetic ordering Magnetic properties and materials Physics
Online-Zugang:	Volltext
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Beschreibung
Zusammenfassung:	We study the effects of magneto-elastic coupling on frustrated spin states of the antiferromagnetic Heisenberg model on a regular triangle and tetrahedron made of spin 1/2 or 1. Displacement of spin is considered as a quantum-mechanical variable. Distortion of clusters occurs through quantum fluctuation of normal modes caused by magneto-elastic coupling. The nonmagnetic phase transitions of vanadium and chromium spinels are discussed.
ISSN:	0953-8984 1361-648X
DOI:	10.1088/0953-8984/19/14/145261