Title: Evidence for a quantum spin Hall phase in graphene decorated with Bi2Te3 nanoparticles

Journal Article · · Science Advances

Realization of the quantum spin Hall effect in graphene devices has remained an outstanding challenge dating back to the inception of the field of topological insulators. Graphene’s exceptionally weak spin-orbit coupling—stemming from carbon’s low mass—poses the primary obstacle. We experimentally and theoretically study artificially enhanced spin-orbit coupling in graphene via random decoration with dilute Bi2Te3 nanoparticles. Multiterminal resistance measurements suggest the presence of helical edge states characteristic of a quantum spin Hall phase; the magnetic field and temperature dependence of the resistance peaks, x-ray photoelectron spectra, scanning tunneling spectroscopy, and first-principles calculations further support this scenario. These observations highlight a pathway to spintronics and quantum information applications in graphene-based quantum spin Hall platforms.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Univ. of California, Irvine, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
FG02-05ER46237
OSTI ID:
1544001
Journal Information:
Science Advances, Journal Name: Science Advances Journal Issue: 11 Vol. 4; ISSN 2375-2548
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English

References (49)

Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set journal July 1996
Fault-tolerant quantum computation by anyons journal January 2003
Edge currents shunt the insulating bulk in gapped graphene journal February 2017
Stacked topological insulator built from bismuth-based graphene sheet analogues journal March 2013
Spin polarization of the quantum spin Hall edge states journal May 2012
Subnanometre-wide electron channels protected by topology journal March 2015
Spatially resolved edge currents and guided-wave electronic states in graphene journal November 2015
Quantum spin Hall state in monolayer 1T'-WTe2 journal June 2017
Reducing Dzyaloshinskii-Moriya interaction and field-free spin-orbit torque switching in synthetic antiferromagnets journal May 2021
High-resolution X-ray luminescence extension imaging journal February 2021
Electronic structure of AlFeN films exhibiting crystallographic orientation change from c- to a-axis with Fe concentrations and annealing effect journal February 2020
Electronic transport properties of Ir-decorated graphene journal October 2015
Spin–orbit interaction in Pt or Bi 2 Te 3 nanoparticle-decorated graphene realized by a nanoneedle method journal July 2018
Topological phases in two-dimensional materials: a review journal May 2016
Edge transport in the trivial phase of InAs/GaSb journal July 2016
Projector augmented-wave method journal December 1994
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set journal October 1996
From ultrasoft pseudopotentials to the projector augmented-wave method journal January 1999
Josephson current and noise at a superconductor/quantum-spin-Hall-insulator/superconductor junction journal April 2009
Van der Waals density functionals applied to solids journal May 2011
Transport study of graphene adsorbed with indium adatoms journal February 2015
Transport in indium-decorated graphene journal June 2015
Quantum Spin Hall Effect in Inverted Type-II Semiconductors journal June 2008
Half-Heusler Compounds as a New Class of Three-Dimensional Topological Insulators journal August 2010
Stabilizing Topological Phases in Graphene via Random Adsorption journal September 2012
Giant Topological Insulator Gap in Graphene with 5 d Adatoms journal December 2012
Robust Helical Edge Transport in Gated InAs / GaSb Bilayers journal March 2015
Generalized Gradient Approximation Made Simple journal October 1996
Quantum Spin Hall Effect in Graphene journal November 2005
Importance of Van Der Waals Interaction for Organic Molecule-Metal Junctions: Adsorption of Thiophene on Cu(110) as a Prototype journal October 2007
Non-Abelian anyons and topological quantum computation journal September 2008
Colloquium: Topological insulators journal November 2010
Topological insulators and superconductors journal October 2011
Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells journal December 2006
Quantum Spin Hall Insulator State in HgTe Quantum Wells journal November 2007
Nonlocal Transport in the Quantum Spin Hall State journal July 2009
Quantum spin Hall effect in two-dimensional transition metal dichalcogenides journal November 2014
Bismuthene on a SiC substrate: A candidate for a high-temperature quantum spin Hall material journal June 2017
Observation of the quantum spin Hall effect up to 100 kelvin in a monolayer crystal journal January 2018
Quantum Spin Hall Effect in Three Dimensional Materials: Lattice Computation of Z 2 Topological Invariants and Its Application to Bi and Sb journal May 2007
Non-Abelian Anyons and Topological Quantum Computation text January 2007
Quantum Spin Hall Effect in Inverted Type II Semiconductors text January 2008
Van der Waals density functionals applied to solids text January 2011
Spatially resolved edge currents and guided-wave electronic states in graphene text January 2015
Electronic transport properties of Ir-decorated graphene text January 2015
Topological Phases in Two-Dimensional Materials: A Brief Review text January 2015
Spin-orbit interaction in Pt or Bi2Te3 nanoparticle-decorated graphene realized by a nanoneedle method text January 2018
Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells text January 2006
Fault-tolerant quantum computation by anyons text January 1997

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Gap oscillations and Majorana bound states in magnetic chains on superconducting honeycomb lattices journal January 2019
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