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EnglishThe voltage-spectral density SV(f) of the 2-dimensional electron gas formed at the interface of LaAlO3/SrTiO3 has been thoroughly investigated. The low-frequency component has a clear 1/f behavior with a quadratic bias current dependence, attributed to resistance fluctuations. However, its temperature dependence is inconsistent with the classical Hooge model, based on carrier-mobility fluctuations. The experimental results are, instead, explained in terms of carrier-number fluctuations, due to an excitation-trapping mechanism of the 2-dimensional electron gas.
http://hdl.handle.net/11386/4228457| Titolo: | Carrier-number fluctuations in the 2-dimensional electron gas at the LaAlO3/SrTiO3 interface |
| Autori interni: | BARONE, CARLO ROMEO, FRANCESCO PAGANO, Sergio |
| Data di pubblicazione: | 2013 |
| Rivista: | APPLIED PHYSICS LETTERS |
| Abstract: | The voltage-spectral density SV(f) of the 2-dimensional electron gas formed at the interface of LaAlO3/SrTiO3 has been thoroughly investigated. The low-frequency component has a clear 1/f behavior with a quadratic bias current dependence, attributed to resistance fluctuations. However, its temperature dependence is inconsistent with the classical Hooge model, based on carrier-mobility fluctuations. The experimental results are, instead, explained in terms of carrier-number fluctuations, due to an excitation-trapping mechanism of the 2-dimensional electron gas. |
| Handle: | http://hdl.handle.net/11386/4228457 |
| Appare nelle tipologie: | 1.1.2 Articolo su rivista con ISSN |
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