High-frequency self-sustained current oscillation in an Esaki-Tsu superlattice monitored via microwave emission
| Autor: | Ekkehard Schomburg, B. Melzer, A. A. Ignatov, Karl Friedrich Renk, Yu. Koschurinov, Stefan Ivanov, K. Hofbeck, S. Schaposchnikov, D.G. Pavel'ev, P. S. Kop'ev, Jörg Grenzer |
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| Rok vydání: | 1996 |
| Předmět: |
Condensed Matter::Quantum Gases
Physics Condensed matter physics Oscillation Superlattice General Physics and Astronomy Bragg's law Fundamental frequency Electron Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Space charge Condensed Matter::Materials Science Bloch oscillations Microwave |
| Zdroj: | Physics Letters A. 218:349-353 |
| ISSN: | 0375-9601 |
| DOI: | 10.1016/0375-9601(96)00367-2 |
| Popis: | We report the observation of a high-frequency self-sustained current oscillation in an n doped GaAs AlAs superlattice (at room temperature) that shows a negative differential conductance (Esaki-Tsu superlattice). The superlattice biased in the region of the negative differential conductance emitted microwave radiation at a fundamental frequency of about 6 GHz and at harmonics. We attribute the oscillation to space charge instabilities inside the superlattice caused by Bragg reflection of electrons in the lowest, wide miniband. |
| Databáze: | OpenAIRE |
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