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18 September 2018 Status of the search for majorana fermions in semiconductor nanowires (Conference Presentation)
Sergey Frolov
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Proceedings Volume 10732, Spintronics XI; 107321O (2018) https://doi.org/10.1117/12.2321220
Event: SPIE Nanoscience + Engineering, 2018, San Diego, California, United States
Abstract
Tunneling spectroscopy measurements on one-dimensional superconducting hybrid materials have revealed signatures of Majorana fermions which are the edge states of a bulk topological superconducting phase. We couple strong spin-orbit semiconductor InSb nanowires to conventional superconductors (NbTiN, Al) to obtain additional signatures of Majorana fermions and to explore the topological phase transition. A potent alternative explanation for many of the recent experimental Majorana reports is that a non-topological Andreev state localizes near the end of a nanowire. We compare Andreev and Majorana modes a investigate ways to clearly distinguish the two phenomena. We are also exploring how Andreev states can be chained together along the nanowire to realize the one-dimensional Kitaev model, a discrete way of generating Majorana modes.
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Sergey Frolov "Status of the search for majorana fermions in semiconductor nanowires (Conference Presentation)", Proc. SPIE 10732, Spintronics XI, 107321O (18 September 2018); https://doi.org/10.1117/12.2321220
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KEYWORDS
Nanowires
Fermions
Semiconductors
Superconductors
Aluminum
Spectroscopy
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