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Lecture Shigeki Onoda


14 October 2010 FWN-Building 5114.0004, Nijenborgh 4, 9747 AG, Groningen
Speaker: Dr. Shigeki Onoda
Affiliation: Concensed Matter Theory Laboratory, RIKEN, Japan
Title: Chiral spin order and pseudo-Nambu-Goldstone modes as elelctromangnons in one-dimensional multiferroic cuprates
Date: Thu Oct 14, 2010
Start: 11.00
Location: FWN-Building 5114.0004
Host: M. Mostovoy
Telephone: +31 50 363 3419


We show by unbiased numerical calculations that the ferromagnetic nearest-neighbor exchange interaction stabilizes a vector spin-chirality order against the quantum fluctuation in a frustrated spin-1/2 chain relevant to multiferroic cuprates, LiCu2O2 and LiCuVO4. Our semi-classical analyses for LiCu2O2 resolve controversies on the helical magnetic structure and unveil the pseudo-Nambu-Goldstone modes as the origin of experimentally observed electromagnons. A difference from NaCu2O2 and a possible ferroelectric/magnetoelectric spin liquid are also discussed.



S. Furukawa, M. Sato, S. Onoda, arXiv:1003.3940.

S. Furukawa, M. Sato, Y. Saiga, S. Onoda, J. Phys. Soc. Jpn. 77, 123712



Last modified:22 October 2012 2.30 p.m.