Self-Organized One-Dimensional Electron Systems on a Low-Symmetry Oxide Surface
- 13 June 2003
- journal article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 90 (23) , 236803
- https://doi.org/10.1103/physrevlett.90.236803
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.Keywords
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