Creating Majorana Modes from Segmented Fermi Surface

Overview

Journal Nat Commun

Specialty Biology

Date 2021 Jan 26

PMID 33495471

Citations 2

Authors

Michal Papaj

Liang Fu

Affiliations

Soon will be listed here.

Abstract

Majorana bound states provide a fertile ground for both investigation of fundamental phenomena as well as for applications in quantum computation. However, despite enormous experimental and theoretical efforts, the currently available Majorana platforms suffer from a multitude of issues that prevent full realization of their potential. Therefore, improved Majorana systems are still highly sought after. Here we present a platform for creating Majorana bound states from 2D gapless superconducting state in spin-helical systems under the in-plane magnetic or Zeeman field. Topological 1D channels are formed by quantum confinement of quasiparticles via Andreev reflection from the surrounding fully gapped superconducting region. Our proposal can be realized using narrow strips of magnetic insulators on top of proximitized 3D topological insulators. This setup has key advantages that include: small required fields, no necessity of fine-tuning of chemical potential, removal of the low-energy detrimental states, and large attainable topological gap.

Citing Articles

Nonreciprocal superconductivity.

Davydova M, Geier M, Fu L Sci Adv. 2024; 10(48):eadr4817.

PMID: 39612323 PMC: 11639219. DOI: 10.1126/sciadv.adr4817.

Signatures of a spin-active interface and a locally enhanced Zeeman field in a superconductor-chiral material heterostructure.

Chen C, Tran J, McFadden A, Simmonds R, Saito K, Chu E Sci Adv. 2024; 10(34):eado4875.

PMID: 39178249 PMC: 11343014. DOI: 10.1126/sciadv.ado4875.

References

Chen A, Park M, Gill S, Xiao Y, Reig-I-Plessis D, MacDougall G . Finite momentum Cooper pairing in three-dimensional topological insulator Josephson junctions. Nat Commun. 2018; 9(1):3478. PMC: 6113236. DOI: 10.1038/s41467-018-05993-w. View

Laeven T, Nijholt B, Wimmer M, Akhmerov A . Enhanced Proximity Effect in Zigzag-Shaped Majorana Josephson Junctions. Phys Rev Lett. 2020; 125(8):086802. DOI: 10.1103/PhysRevLett.125.086802. View

Zhu Z, Papaj M, Nie X, Xu H, Gu Y, Yang X . Discovery of segmented Fermi surface induced by Cooper pair momentum. Science. 2021; 374(6573):1381-1385. DOI: 10.1126/science.abf1077. View

Kayyalha M, Xiao D, Zhang R, Shin J, Jiang J, Wang F . Absence of evidence for chiral Majorana modes in quantum anomalous Hall-superconductor devices. Science. 2020; 367(6473):64-67. DOI: 10.1126/science.aax6361. View

Albrecht S, Higginbotham A, Madsen M, Kuemmeth F, Jespersen T, Nygard J . Exponential protection of zero modes in Majorana islands. Nature. 2016; 531(7593):206-9. DOI: 10.1038/nature17162. View

Trang C, Shimamura N, Nakayama K, Souma S, Sugawara K, Watanabe I . Conversion of a conventional superconductor into a topological superconductor by topological proximity effect. Nat Commun. 2020; 11(1):159. PMC: 6952357. DOI: 10.1038/s41467-019-13946-0. View

Wang M, Liu C, Xu J, Yang F, Miao L, Yao M . The coexistence of superconductivity and topological order in the Bi₂Se₃ thin films. Science. 2012; 336(6077):52-5. DOI: 10.1126/science.1216466. View

Tikhonov E, Shovkun D, Snelder M, Stehno M, Huang Y, Golden M . Andreev Reflection in an s-Type Superconductor Proximized 3D Topological Insulator. Phys Rev Lett. 2016; 117(14):147001. DOI: 10.1103/PhysRevLett.117.147001. View

Manna S, Wei P, Xie Y, Law K, Lee P, Moodera J . Signature of a pair of Majorana zero modes in superconducting gold surface states. Proc Natl Acad Sci U S A. 2020; 117(16):8775-8782. PMC: 7183215. DOI: 10.1073/pnas.1919753117. View

10.

Xu G, Lian B, Tang P, Qi X, Zhang S . Topological Superconductivity on the Surface of Fe-Based Superconductors. Phys Rev Lett. 2016; 117(4):047001. DOI: 10.1103/PhysRevLett.117.047001. View

11.

Fu L, Kane C . Superconducting proximity effect and majorana fermions at the surface of a topological insulator. Phys Rev Lett. 2008; 100(9):096407. DOI: 10.1103/PhysRevLett.100.096407. View

12.

Mourik V, Zuo K, Frolov S, Plissard S, Bakkers E, Kouwenhoven L . Signatures of Majorana fermions in hybrid superconductor-semiconductor nanowire devices. Science. 2012; 336(6084):1003-7. DOI: 10.1126/science.1222360. View

13.

Ren H, Pientka F, Hart S, Pierce A, Kosowsky M, Lunczer L . Topological superconductivity in a phase-controlled Josephson junction. Nature. 2019; 569(7754):93-98. DOI: 10.1038/s41586-019-1148-9. View

14.

He Q, Pan L, Stern A, Burks E, Che X, Yin G . RETRACTED: Chiral Majorana fermion modes in a quantum anomalous Hall insulator-superconductor structure. Science. 2017; 357(6348):294-299. DOI: 10.1126/science.aag2792. View

15.

Ghatak S, Breunig O, Yang F, Wang Z, Taskin A, Ando Y . Anomalous Fraunhofer Patterns in Gated Josephson Junctions Based on the Bulk-Insulating Topological Insulator BiSbTeSe. Nano Lett. 2018; 18(8):5124-5131. DOI: 10.1021/acs.nanolett.8b02029. View

16.

Zhu S, Kong L, Cao L, Chen H, Papaj M, Du S . Nearly quantized conductance plateau of vortex zero mode in an iron-based superconductor. Science. 2019; 367(6474):189-192. DOI: 10.1126/science.aax0274. View

17.

Wang D, Kong L, Fan P, Chen H, Zhu S, Liu W . Evidence for Majorana bound states in an iron-based superconductor. Science. 2018; 362(6412):333-335. DOI: 10.1126/science.aao1797. View

18.

Oreg Y, Refael G, von Oppen F . Helical liquids and Majorana bound states in quantum wires. Phys Rev Lett. 2011; 105(17):177002. DOI: 10.1103/PhysRevLett.105.177002. View

19.

Fornieri A, Whiticar A, Setiawan F, Portoles E, Drachmann A, Keselman A . Evidence of topological superconductivity in planar Josephson junctions. Nature. 2019; 569(7754):89-92. DOI: 10.1038/s41586-019-1068-8. View

20.

Liu W, Cao L, Zhu S, Kong L, Wang G, Papaj M . A new Majorana platform in an Fe-As bilayer superconductor. Nat Commun. 2020; 11(1):5688. PMC: 7655862. DOI: 10.1038/s41467-020-19487-1. View