Nonequilibrium effects during tunneling into manganites
| Autor: | V. Yu. Tarenkov, A. I. D’yachenko, D. I. Boĭchenko |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Materials science
Physics and Astronomy (miscellaneous) Condensed matter physics General Physics and Astronomy Non-equilibrium thermodynamics chemistry.chemical_element Electron Condensed Matter::Mesoscopic Systems and Quantum Hall Effect chemistry Aluminium Condensed Matter::Strongly Correlated Electrons Redistribution (chemistry) Electric potential Electric current Quantum tunnelling Voltage |
| Zdroj: | Low Temperature Physics. 35:823-825 |
| ISSN: | 1090-6517 1063-777X |
| DOI: | 10.1063/1.3253407 |
| Popis: | The current-voltage characteristics of Ag–I–LaCaMnO tunneling junctions have shown an anomalously sharp increase of current near voltages V≈±1V, irrespective of the polarity of the applied potential and the resistance of the sample. The anomalous growth of current in the IVCs of the metal-insulator-manganite contacts is attributed to the presence of resonance levels in the barrier of the tunneling contact and a redistribution of oxygen vacancies under the action of a current of “hot” electrons, resulting in partial metallization of the barrier surface. |
| Databáze: | OpenAIRE |
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