KIAS- APCTP Workshop on "Quantum Materials"
at Korea Institute for Advanced Study (KIAS), Seoul, Korea
July 19(Wed)-22(Sat), 2006
Title | Magnetic Field Control of the Interface in Manganite-Titanate Heterojunctions |
Abstract | A conceptual dilemma arises in the study of oxide thin film heterostructures. The question is: how should one consider the correlated equivalent of band bending? This semiconductor concept is based on the validity of rigid single particle band diagrams, which are known to be an inadequate description for strongly correlated electrons. In addition to presenting an interesting scientific challenge, this underlies attempts to develop new applications for doped Mott insulators in device geometries. Here we present our recent study of rectifying manganite-titanate heterojunctions, in which the interface electronic structure can be modified by a magnetic field, reflecting the strong charge-spin coupling arising from the double-exchange mechanism. |