【报告题目】Giant Magnetoresistance in Hubbard chains
【报告人】Rubem Mondaini，Beijing Computational Science Research Center
The problem of Giant magnetoresistance, which accounts for the ramatic change of a system's transport properties upon application of a magnetic field, is now well understood. Originally discovered ndependently by Albert Fert and Peter Grunberg (resulting in their Nobel Prize in 2007), it was shown to be more prominent in materials composed of magnetic and non-magnetic layers. Based on these results, we propose that a simple model displaying superlattice behavior in a strongly correlated setting, can also be used to understand this effect. Despite its simplicity, it captures the main mechanisms of the charge ransport enhancement with the benefit of allowing an emulation in the context of optical lattices, bridging Atomic and Condensed matter physics.
Ref.: J. Li, C. Cheng, T. Paiva, H.-Q. Lin, and R. Mondaini, Phys. Rev. Lett. 121, 020403 (2018)