Two-dimensional quantum oscillations of the conductance at LaAlO3/SrTiO3 interfaces
| Autor: | Caviglia, A. D., Gariglio, S., Cancellieri, C., Sacépé, B., Fête, A., Reyren, N., Gabay, M., Morpurgo, A. F., Triscone, J. -M. |
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| Rok vydání: | 2010 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevLett.105.236802 |
| Popis: | We report on a study of magnetotransport in LaAlO3/SrTiO3 interfaces characterized by mobilities of the order of several thousands cm$^{2}$/Vs. We observe Shubnikov-de Haas oscillations that indicate a two-dimensional character of the Fermi surface. The frequency of the oscillations signals a multiple sub-bands occupation in the quantum well or a multiple valley configuration. From the temperature dependence of the oscillation amplitude we extract an effective carrier mass $m^{*}\simeq1.45$\,$m_{e}$. An electric field applied in the back-gate geometry increases the mobility, the carrier density and the oscillation frequency. Comment: 4 pages, 4 figures |
| Databáze: | arXiv |
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