Density-of-states effects in lateral-surface superlattices
| Autor: | V. Rosskopf, G. Weimann, G. Böhm, Erich Gornik, G. Berthold, Jürgen Smoliner |
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| Rok vydání: | 1992 |
| Předmět: |
chemistry.chemical_classification
Materials science Condensed matter physics Superlattice Fermi level Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Shubnikov–de Haas effect Magnetic field symbols.namesake chemistry Electrical resistivity and conductivity Density of states symbols Inorganic compound Order of magnitude |
| Zdroj: | Physical review. B, Condensed matter. 45(4) |
| ISSN: | 0163-1829 |
| Popis: | We have investigated the transport properties of lateral-surface superlattices fabricated by laser holography on modulation-doped GaAs-${\mathrm{Al}}_{\mathit{x}}$${\mathrm{Ga}}_{1\mathrm{\ensuremath{-}}\mathit{x}}$As field-effect transistors. Peaks in the differential drain-source resistance are observed in a range where the Fermi level has the same order of magnitude as the potential modulation. If a magnetic field is applied perpendicular to the sample, these peaks are shifted while the peak spacing is increased. Using a two-dimensional numerical model, we show that these effects are caused by a modulation density of states in the superlattice potential. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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