Soft Superconducting Gap in Semiconductor Majorana Nanowires
So Takei, Benjamin M. Fregoso, Hoi-Yin Hui, Alejandro M. Lobos, S. Das Sarma
DOI 10.1103/PhysRevLett.110.186803 · Physical Review Letters
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We theoretically consider the ubiquitous soft gap measured in the tunneling conductance of semiconductor-superconductor hybrid structures, in which recently observed signatures of elusive Majorana bound states have created much excitement. We systematically study the effects of magnetic and nonmagnetic disorder, temperature, dissipative Cooper pair breaking, and interface inhomogeneity, which could lead to a soft gap. We find that interface inhomogeneity with moderate dissipation is the only viable mechanism that is consistent with the experimental observations. Our work indicates that improving the quality of the superconductor-semiconductor interface should result in a harder induced gap.
Similar papers
Soft superconducting gap in semiconductor-based Majorana nanowires
similarity 0.96Tudor D. Stanescu et al.
Source status unknown — claims are unverified
Soft Superconducting Gap in Semiconductor Majorana Nanowires
similarity 0.94So Takei et al. · 2012 · arXiv:1211.1029
Source status unknown — claims are unverified
Soft superconducting gap in semiconductor-based Majorana nanowires
similarity 0.93Tudor D. Stanescu et al. · 2013 · arXiv:1311.2075
Source status unknown — claims are unverified
Robust topological superconductivity in weakly coupled nanowire-superconductor hybrid structures
similarity 0.92Oladunjoye A. Awoga et al.
Source status unknown — claims are unverified