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Title: Chiral Majorana fermion modes in a quantum anomalous Hall insulator–superconductor structure

Journal Article · · Science
ORCiD logo [1];  [1];  [2];  [3];  [1];  [1]; ORCiD logo [4];  [5]; ORCiD logo [5];  [6];  [1]; ORCiD logo [7]; ORCiD logo [3]; ORCiD logo [1]; ORCiD logo [1];  [1]; ORCiD logo [5]; ORCiD logo [3];  [2]; ORCiD logo [8]
  1. Univ. of California, Los Angeles, CA (United States). Dept. of Electrical Engineering, and Computer Engineering, Dept. of Physics, and Dept. of Materials Science and Engineering
  2. Univ. of California, Irvine, CA (United States). Dept. of Physics and Astronomy
  3. Univ. of California, Davis, CA (United States). Dept. of Physics
  4. Fudan Univ., Shanghai (China). State Key Lab. of Surface Physics, Dept. of Physics; Stanford Univ., CA (United States). Dept. of Physics
  5. Stanford Univ., CA (United States). Dept. of Physics
  6. Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)
  7. Univ. of California, Los Angeles, CA (United States). Dept. of Electrical Engineering, and Computer Engineering, Dept. of Physics, and Dept. of Materials Science and Engineering; ShanghaiTech Univ., Shanghai (China). School of Information Science and Technology
  8. Univ. of California, Los Angeles, CA (United States). Dept. of Electrical Engineering, and Computer Engineering, Dept. of Physics, and Dept. of Materials Science and Engineering; King Abdulaziz City for Science and Technology (KACST), Riyadh (Saudi Arabia). Center of Excellence in Green Nanotechnology

Majorana fermion is a hypothetical particle that is its own antiparticle. We report transport measurements that suggest the existence of one-dimensional chiral Majorana fermion modes in the hybrid system of a quantum anomalous Hall insulator thin film coupled with a superconductor. As the external magnetic field is swept, half-integer quantized conductance plateaus are observed at the locations of magnetization reversals, giving a distinct signature of the Majorana fermion modes. This transport signature is reproducible over many magnetic field sweeps and appears at different temperatures. This finding may open up an avenue to control Majorana fermions for implementing robust topological quantum computing.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE; National Science Foundation (NSF)
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1374388
Journal Information:
Science, Vol. 357, Issue 6348; ISSN 0036-8075
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 411 works
Citation information provided by
Web of Science

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Quantum‐Hall to Insulator Transition in Ultra‐Low‐Carrier‐Density Topological Insulator Films and a Hidden Phase of the Zeroth Landau Level journal June 2019
Mechanical Analogue of a Majorana Bound State journal November 2019
The Material Efforts for Quantized Hall Devices Based on Topological Insulators journal December 2019
Exploring Topological Superconductivity in Topological Materials journal July 2019
Geometric Phases in Majorana Zero-Energy State journal May 2019
Superconductivity in Doped Quantum Anomalous Hall Insulators journal September 2018
Fabrication and Characterization of Superconducting Films for Superconductor-Topological Insulator Hybrid Devices journal September 2019
Topological insulator: Spintronics and quantum computations journal May 2019
Topological states of condensed matter journal October 2017
Definite photon deflections of topological defects in metasurfaces and symmetry-breaking phase transitions with material loss journal October 2018
Chiral domain wall motion in unit-cell thick perpendicularly magnetized Heusler films prepared by chemical templating journal November 2018
Proximity-induced surface superconductivity in Dirac semimetal Cd3As2 journal May 2019
Nonreciprocal charge transport at topological insulator/superconductor interface journal June 2019
Unfolding the complexity of phonon quasi-particle physics in disordered materials journal January 2020
Pressure-induced superconductivity in MoP journal May 2018
Pressure-induced superconductivity in topological semimetal NbAs2 journal November 2018
Majorana quantization and half-integer thermal quantum Hall effect in a Kitaev spin liquid journal July 2018
Prediction and observation of an antiferromagnetic topological insulator journal December 2019
Platform of chiral Majorana edge modes and its quantum transport phenomena journal November 2019
Magnetic topological insulators journal January 2019
Enhanced coherence and decoupled surface states in topological insulators through structural disorder journal August 2018
The tunneling magnetoresistance in 2D topological superconductor hybrid structure journal August 2018
Magnetic orbital motion and 0.5 e 2 / h conductance of quantum-anomalous-Hall hybrid strips journal April 2019
The coherent heteroepitaxy of high-index Bi 2 Se 3 thin film on nanofaceted Si(211) substrate journal July 2019
Quantum anomalous Hall effect driven by magnetic proximity coupling in all-telluride based heterostructure journal September 2019
Nontrivial superconductivity in topological MoTe 2− x S x crystals journal August 2018
Topological quantum computation based on chiral Majorana fermions journal October 2018
Visualization of an axion insulating state at the transition between 2 chiral quantum anomalous Hall states journal July 2019
Spectroscopic fingerprint of chiral Majorana modes at the edge of a quantum anomalous Hall insulator/superconductor heterostructure journal December 2019
Quasiparticle interference on type-I and type-II Weyl semimetal surfaces: a review journal January 2018
About heavy neutrinos: lepton-flavor violation in decays of charged leptons journal August 2018
Band structure engineering in 3D topological insulators journal March 2019
Emergence of intrinsic superconductivity below 1.178 K in the topologically non-trivial semimetal state of CaSn 3 journal April 2019
A tunneling current measurement scheme to observe Majorana-zero-mode-induced crossed Andreev reflection journal October 2019
Magnetic proximity in a van der Waals heterostructure of magnetic insulator and graphene journal December 2019
Band twisting and resilience to disorder in long-range topological superconductors journal July 2019
Gate-tunable quantum Hall effects in defect-suppressed B i 2 S e 3 films journal August 2019
Effective model for Majorana modes in graphene journal September 2019
Electrically tunable chiral Majorana edge modes in quantum anomalous Hall insulator–topological superconductor systems journal December 2019
Analytic ground state wave functions of mean-field p x + i p y superconductors with vortices and boundaries journal March 2018
Photoinduced half-integer quantized conductance plateaus in topological-insulator/superconductor heterostructures journal April 2018
Zero Hall conductivity and its electronic origin in a Cr-doped topological insulator journal August 2018
Electromagnetic response of quantum Hall systems in dimensions five and six and beyond journal September 2018
Higher-order topological superconductivity: Possible realization in Fermi gases and Sr 2 RuO 4 journal January 2019
Bulk pumping in two-dimensional topological phases journal January 2019
Phase-dependent heat transport in Josephson junctions with p -wave superconductors and superfluids journal June 2019
Majorana zero modes in regular B-form single-stranded DNA proximity-coupled to an s -wave superconductor journal June 2019
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Intrinsic magnetic topological insulators in van der Waals layered MnBi 2 Te 4 -family materials journal June 2019
Electrically tunable low-density superconductivity in a monolayer topological insulator journal October 2018
Absence of evidence for chiral Majorana modes in quantum anomalous Hall-superconductor devices journal January 2020
Complex band-structure analysis and topological physics of Majorana nanowires journal May 2019
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Electrical detection of the Majorana fusion rule for chiral edge vortices in a topological superconductor journal January 2019
Disorder-induced suppression of the zero-bias conductance peak splitting in topological superconducting nanowires journal January 2018
Data from: Chiral Majorana fermion modes in a quantum anomalous Hall insulator–superconductor structure dataset January 2019
Geometric quenching of orbital pair breaking in a single crystalline superconducting nanomesh network journal December 2018
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Delocalisation of Majorana quasiparticles in plaquette--nanowire hybrid system text January 2018
Intrinsic magnetic topological insulators in van der Waals layered MnBi$_2$Te$_4$-family materials text January 2018
Spectroscopic Fingerprint of Chiral Majorana Modes at the Edge of a Quantum Anomalous Hall Insulator / Superconductor Heterostructure text January 2018
Experimental realization of an intrinsic magnetic topological insulator text January 2018
Symmetry indicators for topological superconductors text January 2018
Emergence of intrinsic superconductivity below 1.178 K in the topologically non-trivial semimetal state of CaSn3 text January 2018
Second-order Topological Superconductors with Mixed Pairing text January 2018
Synthetic Weyl Points and Chiral Anomaly in Majorana Devices with Nonstandard Andreev-Bound-State Spectra text January 2019
Magnetoelectrically-Tunable Andreev-Bound-State Spectra and Spin Polarization in P-Wave Josephson Junctions text January 2019
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Definite photon deflections of topological defects in metasurfaces and symmetry-breaking phase transitions with material loss text January 2018


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