Coherent behavior and nonmagnetic impurity effects of spin disordered state in NiGa 2S 4

Yusuke Nambu, Satoru Nakatsuji, Yoshiteru Maeno

研究成果: ジャーナルへの寄稿学術論文査読

34 被引用数 (Scopus)

抄録

Nonmagnetic impurity effects of the spin disordered state in the triangular antiferromagnet NiGa 2S 4 were studied through magnetic and thermal measurements for Ni 1-xZn xGa 2S 4 (0:0 ≤ x ≤ 0:3). Only 1% substitution is enough to strongly suppress the coherence observed in the spin disordered state. However, the suppression is not complete and the robust feature of the T 2- dependent specific heat and its scaling behavior with the Weiss temperature indicate the existence of a coherent Nambu-Goldstone mode. The absence of either conventional magnetic order or bulk spin freezing suggests a novel symmetry breaking of the ground state.

本文言語英語
論文番号043711
ジャーナルJournal of the Physical Society of Japan
75
4
DOI
出版ステータス出版済み - 2006 4月

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