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|Date and time:||2nd Nov. (Wed.) 16:00〜|
|Place:||SPring-8, "HOUKOUKAN" seminar room|
|Title:||Chiral and multipolar phases in zigzag spin ladder under magnetic field|
|Speaker:||Prof. Toshiya Hikihara (Faculty of Engineering, Gunma University)|
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.