Scale invariance of a diodelike tunnel junction
| Autor: | Cabrera, H., Zanin, D. A., De Pietro, L. G., Michaels, Th., Thalmann, P., Ramsperger, U., Vindigni, A., Pescia, D., Kyritsakis, A., Xanthakis, J. P., Li, Fuxiang, Abanov, Ar. |
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| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | Phys. Rev. B 87, 115436 (2013) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.87.115436 |
| Popis: | We measure the current vs voltage (I-V) characteristics of a diodelike tunnel junction consisting of a sharp metallic tip placed at a variable distance d from a planar collector and emitting electrons via electric-field assisted emission. All curves collapse onto one single graph when I is plotted as a function of the single scaling variable Vd^{-\lambda}, d being varied from a few mm to a few nm, i.e., by about six orders of magnitude. We provide an argument that finds the exponent {\lambda} within the singular behavior inherent to the electrostatics of a sharp tip. A simulation of the tunneling barrier for a realistic tip reproduces both the scaling behavior and the small but significant deviations from scaling observed experimentally. Comment: 6 pages, 6 figures. Accepted for publication in Physical Review B |
| Databáze: | arXiv |
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