Naslov
Origin and Perspectives of High Mobility in LaAlO3/SrTiO3 Structures

Autori
Herranz, Gervasi ; Basletić, Mario ; Bibes, M. ; Carretero, C. ; Tafra, Emil ; Jacquet, E. ; Bouzehouane, Karim ; Deranlot, C. ; Maurice, J.-L. ; Hamzić, Amir ; Contour, J.-P. ; Barthélémy, Agnes ; Fert, Albert

Izvornik
Physical Review Letters (0031-9007) 98 (2007); 216803-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
electronic transport in interface structures; diffusion of impurities; high-field and nonlinear effects

Sažetak
We have investigated the dimensionality and origin of the magnetotransport properties of LaAlO3 films epitaxially grown on TiO2-terminated SrTiO3(001) substrates. High-mobility conduction is observed at low deposition oxygen pressures (PO2<10-5 mbar) and has a three-dimensional character. However, at higher PO2 the conduction is dramatically suppressed and nonmetallic behavior appears. Experimental data strongly support an interpretation of these properties based on the creation of oxygen vacancies in the SrTiO3 substrates during the growth of the LaAlO3 layer. When grown on SrTiO3 substrates at low PO2, other oxides generate the same high mobility as LaAlO3 films. This opens interesting prospects for all-oxide electronics.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA