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|
|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.|