Work

Dressed Majorana Fermion in a Hybrid Nanowire

Year: 2024

Type: article

Abstract: In hybrid systems where nanowires are proximity-coupled with superconductors, the low-energy theory fails to determine the topological phase with Majorana fermion (MF) when the magnetic field or proximity coupling is much stronger. To overcome this limitation, we propose a holistic approach that defines MF by considering both the motion of electrons in the nanowire and the quasiparticle excitations in the superconductor. This approach transcends the constraints of low-energy theory and offers broad applicability. Our approach reveals that the topological phase diagram depends not only on the chemical potential and Zeeman energy in the nanowire, but also on those in the superconductor, and the matched chemical potentials are more favorable for observing MF. This broader perspective provides specific experimental guidance under various conditions.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.133.266605

Authors: Guo-Jian Qiao, Xin Yue, C. P. Sun

Institutions: Beijing Computational Science Research Center, Peking University, China Academy of Engineering Physics, Graduate School of China Academy of Engineering Physics

Language: English

Topic: Topological Materials and Phenomena

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Natural Science Foundation of China, National Safety Academic Fund

Awards: G2507164521, G3621036087, G6617072635