Journal
PHYSICAL REVIEW LETTERS
Volume 108, Issue 17, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.108.177001
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Funding
- DARPA-MTO [FA9550-10-1-0497]
- DARPA-YFA [N66001-10-1-4025]
- ARO [W911NF-09-1-0248]
- NSF-PHY [1104546]
- Division Of Physics
- Direct For Mathematical & Physical Scien [1104546] Funding Source: National Science Foundation
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Majorana fermions were envisioned by Majorana in 1935 to describe neutrinos. Recently, it has been shown that they can be realized even in a class of electron-doped semiconductors, on which ordinary s-wave superconductivity is proximity induced, provided the time reversal symmetry is broken by an external Zeeman field above a threshold. Here we show that in a hole-doped semiconductor nanowire the threshold Zeeman field for Majorana fermions can be very small for some magic values of the hole density. In contrast to the electron-doped systems, smaller Zeeman fields and much stronger spin-orbit coupling and effective mass of holes allow the hole-doped systems to support Majorana fermions in a parameter regime which is routinely realized in current experiments.
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