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Chiral Majorana fermion modes regulated by a scanning tunneling microscope tip
- Source :
- Phys. Rev. B 97, 115452 (2018)
- Publication Year :
- 2017
-
Abstract
- The Majorana fermion can be described by a real wave function with only two phases (0 and {\pi}) which provide a controllable degree of freedom. We propose a strategy to regulate the phase of the chiral Majorana state by coupling with a scanning tunneling microscope tip in a system consisting of quantum anomalous Hall insulator coupled with a superconductor. With the change of the chemical potential, the chiral Majorana state can be tuned alternately between 0 and {\pi}, in which, correspondingly, the perfect normal tunneling and perfect crossed Andreev reflection appear. The perfect crossed Andreev reflection, by which a Cooper pair can be split into two electrons going into different terminals completely, leads to a pumping current and distinct quantized resistances. These findings may provide a signature of Majorana fermions and pave a feasible avenue to regulate the phase of Majorana state.<br />Comment: 9 pages, 7 figures
- Subjects :
- Condensed Matter - Mesoscale and Nanoscale Physics
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. B 97, 115452 (2018)
- Publication Type :
- Report
- Accession number :
- edsarx.1711.03840
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevB.97.115452