Magnetic interactions at the nanoscale in trilayer titanates   LaTiO$_3$/SrTiO$_3$/YTiO$_3$
  We report on the phase diagram of competing magnetic interactions at nanoscale in engineered ultra-thin trilayer heterostructures of LaTiO$_{3}$/SrTiO$_{3}$/YTiO$_{3}$, in which the interfacial inversion symmetry is explicitly broken. Combined atomic layer resolved scanning transmission electron microscopy with electron energy loss spectroscopy and electrical transport have confirmed the formation of a spatially separated two-dimensional electron liquid and high density two-dimensional localized magnetic moments at the LaTiO$_3$/SrTiO$_3$ and SrTiO$_3$/YTiO$_3$ interfaces, respectively. Resonant soft X-ray linear dichroism spectroscopy has demonstrated the presence of orbital polarization of the conductive LaTiO$_3$/SrTiO$_3$ and localized SrTiO$_3$/YTiO$_3$ electrons. Our results provide a route with prospects for exploring new magnetic interfaces, designing tunable two-dimensional $d$-electron Kondo lattice, and potential spin Hall applications. 
Yanwei Cao, Zhenzhong Yang, M. Kareev, Xiaoran Liu, D. Meyers, S.   Middey, D. Choudhury, P. Shafer, Jiandong Guo, J. W. Fre...
cond-mat.str-el cond-mat.mtrl-sci cond-mat.supr-con