Decay rate of evanescent states in bulk SrTiO₃, which determines the attenuation of the charge density of the two-dimensional electron gas at a LaAlO₃/SrTiO₃ interface. States with the lowest decay rate (red) form a cross pattern along the Γ-M directions in the two-dimensional Brillouin zone.

From the article:

Quantum Nature of Two-Dimensional Electron Gas Confinement at ${\mathrm{LaAlO}}_3/{\mathrm{SrTiO}}_3$ Interfaces
Karolina Janicka, Julian P. Velev, and Evgeny Y. Tsymbal
Phys. Rev. Lett. 102, 106803 (2009)

View Issue Table of Contents