Ground state of the spin-1/2 chain of green dioptase at high fields

Autor:	Matsui, Kazuki, Fujisawa, Masashi, Hagiwara, Kenta, Hoshino, Yukihiro, Goto, Takayuki, Sasaki, Takahiko, Tanaka, Hidekazu, Okubo, Susumu, Ohta, Hitoshi
Rok vydání:	2013
Předmět:	Condensed Matter - Strongly Correlated Electrons Condensed Matter - Materials Science
Druh dokumentu:	Working Paper
Popis:	The gem-stone dioptase Cu6Si6O18.6H2O has a chiral crystal structure of equilateral triangular helices consisting of Cu-3d spins. It shows an antiferromagnetic order with an easy axis along c at TN = 15.5 K under zero field, and a magnetization jump at HC = 13.5 T when the field is applied along c-axis. By 29Si-NMR measurements, we have revealed that the high-field state is essentially the two sub-lattice structure, and that the component within ab-plane is collinear. The result indicates no apparent match with the geometrical pattern of helical spin chain. Comment: SCES2013, Hongo, Tokyo
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1309.5472 Zobrazit plný text záznamu View this record from Arxiv