Hole-doped semiconductor nanowire on top of an s-wave superconductor: a new and experimentally accessible system for Majorana fermions |
| |
Authors: | Mao Li Gong Ming Dumitrescu E Tewari Sumanta Zhang Chuanwei |
| |
Institution: | Department of Physics and Astronomy, Washington State University, Pullman, Washington 99164, USA. |
| |
Abstract: | 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. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|