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.