Raman spectra of epitaxial graphene on SiC(0001)
We present Raman spectra of epitaxial graphene layers grown on 6×6 reconstructed silicon carbide surfaces during annealing at elevated temperature. In contrast to exfoliated graphene a significa...
We present Raman spectra of epitaxial graphene layers grown on 6×6 reconstructed silicon carbide surfaces during annealing at elevated temperature. In contrast to exfoliated graphene a significa...
Uniform resistive switching with a thin reactive metal interface layer in metal-La0.7Ca0.3MnO3-metal heterostructures
A thin samarium (Sm) metal layer was introduced to improve the resistive hysteresis and switching uniformity. Sm reacts with the La0.7Ca0.3MnO3 and forms a thin interface oxide layer, which is respons...
A thin samarium (Sm) metal layer was introduced to improve the resistive hysteresis and switching uniformity. Sm reacts with the La0.7Ca0.3MnO3 and forms a thin interface oxide layer, which is respons...
Cotunneling assisted sequential tunneling in multilevel quantum dots
Appl. Phys. Lett. 92, 202101 (2008); doi:10.1063/1.2927379
Published 19 May 2008
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We investigate the conductance and zero-frequency shot noise of interacting, multilevel quantum dots coupled to leads. We observe that cotunneling assisted sequential tunneling (CAST) processes play a dominant role in the transition region from Coulomb blockade to sequential tunneling. We analyze for intermediate coupling strength the dependence of the conductance due to CAST processes on temperature, coupling constant, and gate voltage. Remarkably, the width of the CAST transport feature scales only with temperature, but not with the coupling constant. While the onset of inelastic cotunneling is associated with a super-Poissonian noise, the noise is even stronger above the threshold for CAST processes.
©2008 American Institute of Physics
| History: | Received 21 December 2007; accepted 29 January 2008; published 19 May 2008 |
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http://link.aip.org/link/?APPLAB/92/202101/1 |
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- S. de Franceschi, S. Sasaki, J. M. Elzerman, W. G. van der Wiel, S. Tarucha, and L. P. Kouwenhoven, Phys. Rev. Lett. 86, 878 (2001).
- V. N. Golovach and D. Loss, Phys. Rev. B 69, 245327 (2004).
- S. Schleser, T. Ihn, E. Ruh, K. Ensslin, M. Tews, D. Pfannkuche, D. C. Driscoll, and A. C. Gossard, Phys. Rev. Lett. 94, 206805 (2005).
- For a review of shot noise in mesoscopic systems, see Ya. M. Blanter and M. Büttiker,
Phys. Rep. 336, 1 (2000) . - A. Thielmann, M. H. Hettler, J. König, and G. Schön, Phys. Rev. Lett. 94, 206805 (2005).
- E. Onac, F. Balestro, B. Trauzettel, C. F. J. Lodewijk, and L. P. Kouwenhoven, Phys. Rev. Lett. 96, 026803 (2006).
- Y. Zhang, L. DiCarlo, D. T. McClure, M. Yamamoto, S. Tarucha, C. M. Marcus, M. P. Hanson, and A. C. Gossard, Phys. Rev. Lett. 99, 036603 (2007).
- O. Zarchin, Y. C. Chung, M. Heiblum, D. Rohrlich, and V. Umansky, Phys. Rev. Lett. 98, 066801 (2007).
- J. König, J. Schmid, H. Schoeller, and G. Schön, Phys. Rev. B 54, 16820 (1996).
- J. Aghassi, A. Thielmann, M. H. Hettler, and G. Schön, Phys. Rev. B 73, 195323 (2006).
- J. Aghassi, A. Thielmann, M. H. Hettler, and G. Schön, Appl. Phys. Lett. 89, 052101 (2006).
- J. Aghassi, Ph.D. Thesis, University of Karlsruhe, 2007, see http://www-tfp.physik.uni-karlsruhe.de/Publications.
- D. Becker and D. Pfannkuche, arXiv:0710.1977.
- The width also scales with temperature if only inelastic cotunneling processes and no additional CAST processes are possible at Vco.
