Have Majorana bound states been detected in hybrid superconductor-semiconductor nanowire systems?
Talk
- Ramon Aguado
- Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC
- 20 de juny de 2014 a les 10:00
- IFISC Seminar Room
- Announcement file
Recent experiments [1-3] have reported conductance measurements in semiconducting nanowire-based hybrid systems that support the existence of Majorana bound states (MBS) at normal-superconductor junctions. Although these experiments are partially consistent with the Majorana interpretation [4], other mechanisms such as disorder [5], Andreev bound states [6], or Kondo physics [7] cannot be completely ruled out. After an overview of the experimental situation, I will focus on the last two mechanisms and will explain in detail how they mimic the expected phenomenology of Majorana bound states.
References
[1] V. Mourik, K. Zuo, S. M. Frolov, S. R. Plissard, E. P. A. M. Bakkers, and L. P. Kouwenhoven, Science 336, 1003 (2012).
[2] M. T. Deng, C. L. Yu, G. Y. Huang, M. Larsson, P. Caroff, and H. Q. Xu, Nano Lett. 12, 6414 (2012).
[3] A. Das, Y. Ronen, Y. Most, Y. Oreg, M. Heiblum, and H. Shtrikman, Nat. Phys. 8, 887 (2012).
[4] E. Prada, P. San-Jose, and R. Aguado, Phys. Rev. B 86, 180503(R) (2012).
[5] J. Liu, A. C. Potter, K. T. Law, and P. A. Lee, Phys. Rev. Lett. 109, 267002 (2012).
[6] E. J. H. Lee, X. Jiang, M. Houzet, R. Aguado, C. M. Lieber, and S. De Franceschi, Nature Nanotechnology, 9, 79 (2014).
[7] E. J. H. Lee, X. Jiang, R. Aguado, G. Katsaros, C. M. Lieber, and S. De Franceschi, Phys. Rev. Lett. 109, 186802 (2012); R. Zitko, J. S. Lim, R. Lopez and R. Aguado, arXiv:1405.6084 (2014).
Detalls de contacte:
Rosa Lopez
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