Enhanced spin-orbit coupling and charge carrier density suppression in   LaAl1-xCrxO3/SrTiO3 heterointerfaces
  We report a gradual suppression of the two-dimensional electron gas (2DEG) at the LaAlO3/SrTiO3 interface on substitution of chromium at the Al sites. The sheet carrier density at the interface (ns) drops monotonically from 2.2x10(14) cm-2 to 2.5x10(13) cm-2 on replacing nearly 60 percent of Al sites by Cr and the sheet resistance (Rs) exceeds the quantum limit for localization (h/2e2) in the concentrating range 40 to 60 percent of Cr. 
Pramod Kumar, Anjana Dogra, P. P. S. Bhadauria, Anurag Gupta, K. K.   Maurya and R. C. Budhani
cond-mat.str-el cond-mat.mtrl-sci