Abstract
By introducing floating leads to mimic the decoherence mechanism, we study the influence of the decoherence effect on the Fano interference in electron transport through a parallel double quantum dot (QD) structure. We find that when the decoherence effect is incorporated in the resonant channel, the Fano interference can apparently be suppressed, especially in the case of ϕ = π (ϕ is the phase due to the presence of a local magnetic flux). On the other hand, if the decoherence effect is introduced into the nonresonant channel, the Fano antiresonance is independent of the strengthening of the decoherence effect. If the magnetic flux is absent, the Fano antiresonance valley will be widened by the decoherence. When ϕ = π, the Fano lineshape in the conductance spectrum is robust. By analyzing the electron motion is this system, we clarified all the results. We hope that these results will be helpful for relevant experiments.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
L. P. Kouwenhoven, C. M. Marcus, P. L. McEuen, S. Tarucha, R. M. Westervelt, and N. S. Wingreen, in Mesoscopic Electron Transport, Proceedings of the NATO Advanced Study Institute on Mesoscopic Electron Transport, Series E345, edited by L. L. Sohn, L. P. Kouwenhoven and G. Schön (Kluwer, Dordrecht, 1997).
S. M. Reimann and M. Manninen, Rev. Mod. Phys. 74, 1283 (2002).
G. Hackenbroich, Phys. Rep. 343, 463 (2001).
A. Yacoby, M. Heiblum, D. Mahalu and H. Shtrikman, Phys. Rev. Lett. 74, 4047 (1995).
U. Fano, Phys. Rev. 124, 1866 (1961).
K. Kobayashi, H. Aikawa, S. Katsumoto and Y. Iye, Phys. Rev. Lett. 88, 256806 (2002); M. Sato, H. Aikawa, K. Kobayashi, S. Katsumoto and Y. Iye, Phys. Rev. Lett. 95, 066801 (2005.
J. Göres, D. Goldhaber-Gordon, S. Heemeyer and M. A. Kastner, Phys. Rev. B 62, 2188 (2000).
I. G. Zacharia, D. Goldhaber-Gordon, G. Granger, M. A. Kastner, Y. B. Khavin, H. Shtrikman, D. Mahalu and U. Meirav, Phys. Rev. B 64, 155311 (2001).
B. R. Bułka and P. Stefański, Phys. Rev. Lett. 86, 5128 (2001).
B. Kubala and J. König, Phys. Rev. B 65, 245301 (2002).
M. L. Ladron de Guevara, F. Claro and P. A. Orellana, Phys. Rev. B 67, 195335 (2003).
H. Lu, R. Lü and B. F. Zhu, Phys. Rev. B 71, 235320 (2005).
A. A. Clerk, X. Waintal and P. W. Brouwer, Phys. Rev. Lett. 86, 4636 (2001).
S. Tanaka, S. Garmon, G. Ordonez and T. Petrosky, Phys. Rev. B 76, 153308 (2007); B. H. Wu and J. C. Cao, J. Phys.: Condens. Matter 16, 8285 (2004).
Y. J. Xiong and S. J. Xiong, Phys. Rev. B 65, 201302 (2002); K. H. Ahn and P Mohanty, Phys. Rev. B 63, 195301 (2001).
L. Liu, Y. Du, H. Zhou and T. Lin Phys. Rev. B 54, 1953 (1996).
A. Ueda and M. Eto, Phys. Rev. B 73, 235353 (2006).
J. König and Y. Gefen, Phys. Rev. Lett. 86, 3855 (2001); Phys. Rev. B 65, 045316 (2002).
M. Buttiker, Phys. Rev. Lett. 57, 1761 (1986); H. Q. Xu, Appl. Phys. Lett. 78, 2064 (2001).
W. Gong, Y. Zheng, Y. Liu and T. Lü, Phys. Rev. B 73, 245329 (2006).
Y. Liu, Y. Zheng, W. Gong and T. Lü, (unpublished).
Y. Meir and N. S. Wingreen, Phys. Rev. Lett. 68, 2512 (1992); A. P. Jauho, N. S. Wingreen and Y. Meir, Phys. Rev. B 50, 5528 (1994).
S. Datta, Electron Transport in Mesoscopic Systems (Cambridge University Press, Cambridge, England, 1997).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Yang, CJ., Ren, FZ. & Gong, WJ. Fano interference in a parallel double quantum dot interferometer modified by the decoherence effect. Journal of the Korean Physical Society 64, 872–878 (2014). https://doi.org/10.3938/jkps.64.872
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.3938/jkps.64.872