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Impedance-based interfacial analysis of the LaAlO3/SrTiO3 oxide heterostructure involving a 2-dimensional electron gas layer.
- Source :
-
Journal of Physics & Chemistry of Solids . Jul2015, Vol. 82, p60-66. 7p. - Publication Year :
- 2015
-
Abstract
- The 2-dimensional electron gas (2DEG) at the LaAlO 3 /SrTiO 3 heterointerface was analyzed using frequency-dependent impedance spectroscopy. The electrical conduction of 2DEG significantly influences the high-frequency impedance and induces dielectric amplification at low frequency regimes. The impedance responses obtained from the LaAlO 3 /SrTiO 3 oxide was modeled using an equivalent circuit model. The frequency-dependent characterization used here does not necessitate the formation of ohmic contacts between the 2DEG layer and the adjacent electrodes. Through thermal bias-stress tests, the 2DEG conduction mechanism is proposed to partially originate from the oxygen vacancy-controlled defect concepts, indicating the controllability of 2DEG transport. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00223697
- Volume :
- 82
- Database :
- Academic Search Index
- Journal :
- Journal of Physics & Chemistry of Solids
- Publication Type :
- Academic Journal
- Accession number :
- 102054282
- Full Text :
- https://doi.org/10.1016/j.jpcs.2015.03.002