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- W2891748846 abstract "Synchrotron-radiation angle-resolved and core-level photoemission spectroscopy are used together to investigate the origin of the two-dimensional electron gas on the surface of single crystal CdO (100) films. A reduction in the two-dimensional electron density of the surface state is observed under the synchrotron beam during ARPES, which is shown to be accompanied by a concomitant reduction in the surface-adsorbed species (monitored through the O 1s core level signal). This shows that surface adsorbates donate electrons into the surface accumulation layer. When the surface is cleaned, the surface conduction band state empties. A surface doped with atomic H is also studied. Here, interstitial H increases the two-dimensional electron density at the surface. This demonstrates that reversible donor doping is possible. The surface band bending profiles, 2D electron densities, and effective masses are calculated from subband dispersion simulations." @default.
- W2891748846 created "2018-09-27" @default.
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- W2891748846 date "2019-02-21" @default.
- W2891748846 modified "2023-10-18" @default.
- W2891748846 title "Origin of the two-dimensional electron gas at the CdO (100) surface" @default.
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- W2891748846 doi "https://doi.org/10.1103/physrevb.99.085433" @default.
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