Report
Multi-band superconductivity and nanoscale inhomogeneity at oxide interfaces
| العنوان: | Multi-band superconductivity and nanoscale inhomogeneity at oxide interfaces |
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| المؤلفون: | Caprara, S., Biscaras, J., Bergeal, N., Bucheli, D., Hurand, S., Feuillet-Palma, C., Rastogi, A., Budhani, R. C., Lesueur, J., Grilli, M. |
| المصدر: | Physical Review B 88, 020504(R) (2013) |
| سنة النشر: | 2013 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Superconductivity |
| الوصف: | The two-dimensional electron gas at the LaTiO3/SrTiO3 or LaAlO3/SrTiO3 oxide interfaces becomes superconducting when the carrier density is tuned by gating. The measured resistance and superfluid density reveal an inhomogeneous superconductivity resulting from percolation of filamentary structures of superconducting "puddles" with randomly distributed critical temperatures, embedded in a non-superconducting matrix. Following the evidence that superconductivity is related to the appearance of high-mobility carriers, we model intra-puddle superconductivity by a multi-band system within a weak coupling BCS scheme. The microscopic parameters, extracted by fitting the transport data with a percolative model, yield a consistent description of the dependence of the average intra-puddle critical temperature and superfluid density on the carrier density. Comment: 7 pages with 3 figures + supplemental material (4 pages and 5 figures) |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.88.020504 |
| URL الوصول: | http://arxiv.org/abs/1304.2970 |
| رقم الانضمام: | edsarx.1304.2970 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.88.020504 |
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