Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Disordered quantum transport in quantum anomalous Hall insulator-superconductor junctions

Journal Article · · Physical Review B
 [1];  [2]
  1. Pennsylvania State Univ., University Park, PA (United States); Penn State University
  2. Pennsylvania State Univ., University Park, PA (United States)
In this work we numerically studied disordered quantum transport in a quantum anomalous Hall insulator-superconductor junction based on the effective edge model approach. In particular, we focus on the parameter regime with the mean-free path due to elastic scattering much smaller than the sample size and superconductor coherence length, and discuss disordered transport behavior in the presence of different numbers of chiral edge modes, as well as nonchiral metallic modes. Our numerical results demonstrate that the presence of multiple chiral edge modes or nonchiral metallic modes will lead to a strong Andreev conversion, giving rise to half-electron half-hole transmission through the junction structure, in sharp contrast to the suppression of Andreev conversion in the single chiral edge mode case. Finally, our results suggest the importance of additional transport modes in the quantum anomalous Hall insulator-superconductor junction and will guide future transport measurements.
Research Organization:
Pennsylvania State Univ., University Park, PA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0019064
OSTI ID:
1783179
Journal Information:
Physical Review B, Journal Name: Physical Review B Journal Issue: 14 Vol. 102; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (60)

Non-Centrosymmetric Superconductors: Introduction and Overview book January 2012
Random network models and quantum phase transitions in two dimensions journal October 2005
Quantum Hall Effect in Graphene with Superconducting Electrodes journal January 2012
Induced superconductivity in high-mobility two-dimensional electron gas in gallium arsenide heterostructures journal June 2015
Ballistic Josephson junctions in edge-contacted graphene journal July 2015
Non-Abelian statistics and topological quantum information processing in 1D wire networks journal February 2011
Exotic circuit elements from zero-modes in hybrid superconductor–quantum-Hall systems journal October 2014
Inducing superconducting correlation in quantum Hall edge states journal April 2017
Andreev reflection and enhanced subgap conductance in NbN∕Au∕InGaAs‐InP junctions journal September 2004
Josephson supercurrent in Nb/InN-nanowire/Nb junctions journal March 2010
New directions in the pursuit of Majorana fermions in solid state systems journal June 2012
Quantum transport through a graphene nanoribbon–superconductor junction journal July 2009
Single-walled carbon nanotube superconductor entangler: noise correlations and Einstein Podolsky Rosen states journal December 2002
Tunneling Model of the Superconducting Proximity Effect journal November 1968
Superconductor–normal-metal–superconductor junction in a strong magnetic field journal July 1994
Transport properties of semiconductor-superconductor junctions in quantizing magnetic fields journal February 1998
Conductance fluctuations of semiconductor-superconductor microjunctions in the quantum Hall regime journal September 1998
Andreev reflection at high magnetic fields journal March 1999
Thermal metal in network models of a disordered two-dimensional superconductor journal December 2001
Conductance oscillations with magnetic field of a two-dimensional electron gas–superconductor junction journal June 2007
Andreev reflection and strongly enhanced magnetoresistance oscillations in Ga x In 1 − x As ∕ In P heterostructures with superconducting contacts journal September 2007
Josephson current and noise at a superconductor/quantum-spin-Hall-insulator/superconductor junction journal April 2009
Proximity effect at the superconductor–topological insulator interface journal June 2010
Robustness of Majorana fermions in proximity-induced superconductors journal September 2010
Chiral topological superconductor from the quantum Hall state journal November 2010
Spin-triplet supercurrent carried by quantum Hall edge states through a Josephson junction journal May 2011
Topological superconducting phase and Majorana fermions in half-metal/superconductor heterostructures journal August 2011
Proximity-induced superconductivity in two-dimensional electronic systems journal August 2011
Instability of topological order and localization of edge states in HgTe quantum wells coupled to s -wave superconductor journal August 2011
Andreev magnetointerferometry in topological hybrid junctions journal October 2013
Edge-state-induced Andreev oscillation in quantum anomalous Hall insulator-superconductor junctions journal April 2016
Two-terminal transport along a proximity-induced superconducting quantum Hall edge journal December 2017
Quantum anomalous Hall Majorana platform journal February 2018
Disorder-induced half-integer quantized conductance plateau in quantum anomalous Hall insulator-superconductor structures journal March 2018
Quasi-one-dimensional quantum anomalous Hall systems as new platforms for scalable topological quantum computation journal March 2018
Quantum phase transition of chiral Majorana fermions in the presence of disorder journal March 2018
Distribution of conductances in chiral topological superconductor junctions journal January 2019
Superconducting Proximity Effect and Majorana Fermions at the Surface of a Topological Insulator journal March 2008
Crossed Andreev Reflection in a Graphene Bipolar Transistor journal April 2008
Anomalous Edge Transport in the Quantum Anomalous Hall State journal August 2013
Zero-Field Dissipationless Chiral Edge Transport and the Nature of Dissipation in the Quantum Anomalous Hall State journal July 2015
Majorana Zero Mode Detected with Spin Selective Andreev Reflection in the Vortex of a Topological Superconductor journal June 2016
1 2 ( e 2 / h ) Conductance Plateau without 1D Chiral Majorana Fermions journal March 2018
Inter-Landau-level Andreev Reflection at the Dirac Point in a Graphene Quantum Hall State Coupled to a NbSe 2 Superconductor journal August 2018
Multiple Chiral Majorana Fermion Modes and Quantum Transport journal December 2018
Observation of Maximum Supercurrent Quantization in a Superconducting Quantum Point Contact journal November 1995
Andreev Reflection in Strong Magnetic Fields journal February 2000
Superconducting 2D System with Lifted Spin Degeneracy: Mixed Singlet-Triplet State journal July 2001
Superconductivity without Inversion Symmetry: MnSi versus C e P t 3 S i journal March 2004
Andreev Reflection at High Magnetic Fields: Evidence for Electron and Hole Transport in Edge States journal August 2005
Detection of Valley Polarization in Graphene by a Superconducting Contact journal April 2007
Fractionalizing Majorana Fermions: Non-Abelian Statistics on the Edges of Abelian Quantum Hall States journal October 2012
Universal Topological Quantum Computation from a Superconductor-Abelian Quantum Hall Heterostructure journal March 2014
Superconducting Analogue of the Parafermion Fractional Quantum Hall States journal July 2014
Non-Abelian anyons and topological quantum computation journal September 2008
Supercurrent in the quantum Hall regime journal May 2016
Chiral Majorana fermion modes in a quantum anomalous Hall insulator–superconductor structure journal July 2017
Absence of evidence for chiral Majorana modes in quantum anomalous Hall-superconductor devices journal January 2020
Topological Phases with Parafermions: Theory and Blueprints journal March 2016
Andreev transport in two-dimensional normal-superconducting systems in strong magnetic fields journal July 2010

Similar Records

Absence of evidence for chiral Majorana modes in quantum anomalous Hall-superconductor devices
Journal Article · Wed Jan 01 19:00:00 EST 2020 · Science · OSTI ID:1580806

Absence of evidence for chiral Majorana modes in quantum anomalous Hall-superconductor devices
Journal Article · Wed Jan 01 23:00:00 EST 2020 · Science · OSTI ID:1803543

Chiral topological superconductor and half-integer conductance plateau from quantum anomalous Hall plateau transition
Journal Article · Sun Aug 30 20:00:00 EDT 2015 · Physical Review. B, Condensed Matter and Materials Physics · OSTI ID:1326857