セミナー情報

原子力機構・兵県大合同物性コロキウム(第81回)

日時: 平成24年5月24日(木) 16:00〜
Date and time: 24th May (Thu.) 16:00〜
場所: SPring-8, 萌光館
Place: SPring-8, "HOUKOUKAN" seminar room
Title: Novel order and spin liquid in two-dimensional frustrated Heisenberg antiferromagnets
講演者: 川村光 氏(大阪大学)
Speaker: Prof. Hikaru Kawamura (Osaka University)
Abstract:

Ordering of geometrically frustrated magnets has attracted much recent interest, since it often leads to intriguing phenomena like a spin-liquid behavior and an unconventional magnetic ordering. In this talk, I wish to take up two such examples from the ordering of frustrated antiferromagnetic Heisenberg model in two dimensions. One is an exotic vortex order and a "spin-gel" state realized in the antiferromagnetic Heisenberg model on the two-dimensional triangular lattice, which might have some relevance to the transition-like behavior recently observed in certain triangular-lattice antiferromagnets, and the other is a novel first-order transition and topological excitations realized in the antiferromagnetic Heisenberg model on a distorted kagome lattice, which might have some relevance to recent experiments on certain kagome-lattice antiferromagnets.