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19 April 2024 |
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Spin gap formation in the quantum spin systems TiOX, X=Cl and Br | | P. Lemmens
; K.Y. Choi
; R. Valenti
; T. Saha-Dasgupta
; E. Abel
; Y.S. Lee
; F.C. Chou
; | | Date: |
24 Dec 2004 | | Subject: | Strongly Correlated Electrons | cond-mat.str-el | | Abstract: | In the layered quantum spin systems TiOCl and TiOBr the magnetic susceptibility shows a very weak temperature dependence at high temperatures and transition-induced phenomena at low temperatures. There is a clear connection of the observed transition temperatures to the distortion of the octahedra and the layer separation. Band structure calculations point to a relation of the local coordinations and the dimensionality of the magnetic properties. While from magnetic Raman scattering only a small decrease of the magnetic exchange by -5-10% is derived comparing TiOCl with TiOBr, the temperature dependence of the magnetic susceptibility favors a much bigger change. | | Source: | arXiv, cond-mat/0501577 | | Services: | Forum | Review | PDF | Favorites | |
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