Origin of the Two-Dimensional Electron Gas Carrier Density at theonInterface
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- 15 December 2008
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 101 (25), 256801
- https://doi.org/10.1103/physrevlett.101.256801
Abstract
Transport measurements of the two-dimensional electron gas at the interface have found a density of carriers much lower than expected from the “polar catastrophe” arguments. From a detail density-functional study, we suggest how this discrepancy may be reconciled. We find that electrons occupy multiple subbands at the interface leading to a rich array of transport properties. Some electrons are confined to a single interfacial layer and susceptible to localization, while others with small masses and extended over several layers are expected to contribute to transport.
Keywords
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