セミナー情報

原子力機構・兵県大合同物性コロキウム(第78回)

日時: 平成23年11月2日(水) 16:00〜
Date and time: 2nd Nov. (Wed.) 16:00〜
場所: SPring-8, 萌光館
Place: SPring-8, "HOUKOUKAN" seminar room
Title: Chiral and multipolar phases in zigzag spin ladder under magnetic field
講演者: 引原俊哉 氏(群馬大学工学部)
Speaker: Prof. Toshiya Hikihara (Faculty of Engineering, Gunma University)
Abstract:

The search for unconventional orders and phases in strongly-correlated systems has been a central issue in condensed-matter physics. In this talk, I will discuss a spin-1/2 Heisenberg chain with competing nearest-neighbor and next-nearest-neighbor exchange couplings under magnetic field. The model has been studied intensively since the frustration between the exchange couplings can yield a variety of novel quantum phases. After an introduction and brief review of studies on frustrated magnetism, I will present results of our recent studies on the model, especially focusing on the novel chiral and multipolar orders, which emerge in a wide parameter space in the ground-state phase diagram. Experimental observation of the orders in real compounds such as LiCuVO4 and Rb2Cu2Mo3O12 is also discussed.