Why some interfaces cannot be sharp

A central goal of modern materials physics and nanoscience is the control of materials and their interfaces to atomic dimensions. For interfaces between polar and nonpolar layers, this goal is thwarted by a polar catastrophe that forces an interfacial reconstruction. In traditional semiconductors, this reconstruction is achieved by an atomic disordering and stoichiometry change at the interface, but a new option is available in multivalent oxides: if the electrons can move, the atoms do not have to.

Published in

Nature Materials

Authored by

Nakagawa, N.; Hwang, H. Y.; Muller, D. A.

Publication date

Sunday, January 22, 2006
Resource category
Technique category