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Title: Floquet Majorana zero and π modes in planar Josephson junctions

Journal Article · · Physical Review B
 [1];  [1];  [1]
  1. New York Univ. (NYU), NY (United States). Dept. of Physics

Here, we highlight how Floquet Majorana fermions may be experimentally realized by periodic driving of a solid-state platform. The system comprises a planar Josephson junction made of a proximitized heterostructure containing a two-dimensional electron gas with Rashba spin-orbit coupling and Zeeman field. We map the subgap Andreev bound states of the junction to an effective one-dimensional Kitaev model with long-range hopping and pairing terms. Using this effective model, we study the response of the system to periodic driving of the chemical potential, as applied via microwaves through a top gate. We use the bulk Floquet topological invariants to characterize the system in terms of the number of zero and π Majorana modes for experimentally realistic parameters. We present signatures of these modes on differential conductance and local density of states. A notable feature is subharmonic response to the drive when both Majorana zero and π modes are present, thus opening up the possibility of using this feature to clearly identify Majorana modes. Furthermore, we illustrate the robustness of these features to disorder, and show that despite hybridization due to long localization lengths, the main features of the subharmonic response are still identifiable in an experimental system that is readily accessible.

Research Organization:
New York Univ. (NYU), NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
Grant/Contract Number:
SC0010821; DMR-1836687; MRSEC-1420073
OSTI ID:
1596112
Alternate ID(s):
OSTI ID: 1498576
Journal Information:
Physical Review B, Vol. 99, Issue 9; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 19 works
Citation information provided by
Web of Science

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  • Kitagawa, Takuya; Broome, Matthew A.; Fedrizzi, Alessandro
  • Proceedings of the International Quantum Electronics Conference and Conference on Lasers and Electro-Optics Pacific Rim 2011 https://doi.org/10.1364/iqec.2011.i750
conference January 2011
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Topological Floquet Phases in Driven Coupled Rashba Nanowires text January 2016
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Floquet Majorana fermions and parafermions in driven Rashba nanowires text January 2017
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Cited By (5)

Quasiparticles of a periodically driven quantum dot coupled between superconducting and normal leads journal August 2019
Algebraic localization from power-law couplings in disordered quantum wires journal October 2019
Non-Hermitian Floquet topological superconductors with multiple Majorana edge modes journal January 2020
Floquet second-order topological superconductor driven via ferromagnetic resonance journal November 2019
Tuning Topological Superconductivity in Phase-Controlled Josephson Junctions with Rashba and Dresselhaus Spin-Orbit Coupling text January 2019