|COOKIES: By using this website you agree that we can place Google Analytics Cookies on your device for performance monitoring.|
Oxygen-vacancy-induced charge carrier in n-type interface of LaAlO3 overlayer on SrTiO3 (001): interface vs bulk doping carrier
If you have a question about this talk, please contact Daniel Cole.
We investigated the role of oxygen vacancy in n-type interface of LaAlO3 (LAO) overlayer on SrTiO3 (STO) (001) by carrying out density-functional-theory calculations. Comparing the total energies of the configurations with one vacancy in varying locations we found that oxygen vacancies favor to appear first in LAO surface. These oxygen vacancies in the surface generate a two-dimensional distribution of carriers at the interface, resulting in band bending at the interface in STO side. Dependent on the concentration of oxygen vacancies in LAO surface, the induced carrier charge at the interface partially or completely compensates the polar electric field in LAO . Moreover, the electronic properties of oxygen vacancies in STO are also presented. Every oxygen vacancy in STO generates two electron carriers, but this carrier charge has no effect on screening polar field in LAO . Band structures at the interface dependent on the concentrations of oxygen vacancies are presented and compared with experimental results.
This talk is part of the TCM Journal Club series.
This talk is included in these lists:
Note that ex-directory lists are not shown.
Other listsCafe Scientifique Cambridge Finance Workshop Series Workshop in Microeconomics
Other talksLie's Third Theorem in Synthetic Differential Geometry Probing morphology, electronic structure, and triplet routes: the case for time-resolved EPR in organic electronics Cultures of Forecasting on Mt. Merapi Carbon Pricing and Firm Profits: Theory and Estimates for US Airlines Primary Care Unit Away Day for Unit members Ground States for Diffusion Dominated Free Energies with Logarithmic Interaction