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Updated: Aug 16, 2026

Fabrication of Spatially Confined Complex Oxides
Published on: July 1, 2013
Self-organized one-dimensional electron systems on a low-symmetry oxide surface
B Razaznejad1, C Ruberto, P Hyldgaard
1Department of Applied Physics, Chalmers University of Technology and Göteborg University, SE-412 96 Göteborg, Sweden.
Abstract:
A new one-dimensional electron gas, metallic over a temperature range of 1-800 K, is predicted on the kappa-Al2O3(001;) surface by means of density-functional theory (DFT) calculations. The robustness against the Peierls instability is tested using a tight-binding model with DFT-calculated parameters. The critical transition temperature T(c) is shown to be smaller than 1 K. The low value of T(c) makes this system suited for studying Luttinger-liquid (LL) behavior. For future experiments, the LL parameters are estimated, yielding a high electrical conductivity.
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