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Observation of Dirac Node Formation and Mass Acquisition in a Topological Crystalline Insulator

Journal Article · · Science
 [1];  [2];  [3];  [4];  [4];  [4];  [5];  [5];  [3];  [6];  [6];  [3];  [5];  [4];  [2];  [4]
  1. Boston College, Chestnut Hill, MA (United States); Tohoku Univ., Sendai (Japan); Office of Scientific and Technical Information (OSTI)
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  3. Northeastern Univ., Boston, MA (United States)
  4. Boston College, Chestnut Hill, MA (United States)
  5. Princeton Univ., NJ (United States)
  6. National Taiwan Univ., Taipei (Taiwan)

In topological crystalline insulators (TCIs), topology and crystal symmetry intertwine to create surface states with distinct characteristics. The breaking of crystal symmetry in TCIs is predicted to impart mass to the massless Dirac fermions. Here, we report high-resolution scanning tunneling microscopy studies of a TCI, Pb1-xSnxSe that reveal the coexistence of zero-mass Dirac fermions protected by crystal symmetry with massive Dirac fermions consistent with crystal symmetry breaking. In addition, we show two distinct regimes of the Fermi surface topology separated by a Van-Hove singularity at the Lifshitz transition point. Our work paves the way for engineering the Dirac band gap and realizing interaction-driven topological quantum phenomena in TCIs.

Research Organization:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
SC0010526
OSTI ID:
1557595
Journal Information:
Science, Journal Name: Science Journal Issue: 6153 Vol. 341; ISSN 0036-8075
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English

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Erratum: Observation of ultrahigh mobility surface states in a topological crystalline insulator by infrared spectroscopy journal October 2017
Quasiparticle interference and nonsymmorphic effect on a floating band surface state of ZrSiSe journal October 2018
Three-dimensional topological acoustic crystals with pseudospin-valley coupled saddle surface states journal November 2018
Massive and massless Dirac fermions in Pb1−xSnxTe topological crystalline insulator probed by magneto-optical absorption journal February 2016
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New classes of topological crystalline insulators having surface rotation anomaly journal December 2019
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Length Scale and Dimensionality of Defects in Epitaxial SnTe Topological Crystalline Insulator Films journal January 2017
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Enhancement of the anisotropic thermoelectric power factor of topological crystalline insulator SnTe and related alloys via external perturbations journal January 2019
Quantum coherent transport in SnTe topological crystalline insulator thin films journal September 2014
Unexpected superconductivity at nanoscale junctions made on the topological crystalline insulator Pb 0.6 Sn 0.4 Te journal September 2016
Fundamental insights to topological quantum materials: A real-space view of 13 cases by supersymmetry of valence bonds approach journal March 2019
Topology on a new facet of bismuth journal June 2019
Quasiparticle interference on type-I and type-II Weyl semimetal surfaces: a review journal January 2018
Hybridization of topological surface states with a flat band journal January 2020
Topological phase transition and highly tunable topological transport in topological crystalline insulator Pb 1− x Sn x Te (111) thin films journal April 2019
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Purely rotational symmetry-protected topological crystalline insulator $\alpha$ -Bi 4 Br 4 journal May 2019
Symmetry-dependent topological phase transitions in PbTe layers journal January 2018
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Proximity-induced superconductivity in a topological crystalline insulator journal December 2019
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Observation of topological crystalline insulator surface states on (111)-oriented Pb 1 − x Sn x Se films journal February 2014
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Symmetry breaking and Landau quantization in topological crystalline insulators journal July 2014
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Electrically tunable quantum spin Hall state in topological crystalline insulator thin films journal February 2015
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Topological crystalline insulator and quantum anomalous Hall states in IV-VI-based monolayers and their quantum wells journal May 2015
Topological phase diagram and saddle point singularity in a tunable topological crystalline insulator journal August 2015
Theory of interacting topological crystalline insulators journal August 2015
Drumhead surface states and topological nodal-line fermions in TlTaSe 2 journal March 2016
Surface magnetism in topological crystalline insulators journal November 2017
Bulk characterization of topological crystalline insulators: Stability under interactions and relations to symmetry enriched U (1) quantum spin liquids journal January 2018
Origin of the extremely large magnetoresistance in topological semimetal PtS n 4 journal May 2018
Black-hole horizon in the Dirac semimetal Zn 2 In 2 S 5 journal September 2018
Spin stiffness and domain walls in Dirac-electron mediated magnets journal January 2019
Topological nature of step-edge states on the surface of the topological crystalline insulator Pb 0.7 Sn 0.3 Se journal April 2019
Experimental Observation of Dirac-like Surface States and Topological Phase Transition in Pb 1 − x Sn x Te ( 111 ) Films journal May 2014
Layered Topological Crystalline Insulators journal August 2015
Temperature-Induced Lifshitz Transition in WTe 2 journal October 2015
Quantum Nonlinear Hall Effect Induced by Berry Curvature Dipole in Time-Reversal Invariant Materials journal November 2015
SU(3) Quantum Hall Ferromagnetism in SnTe journal January 2016
Weak-link Josephson Junctions Made from Topological Crystalline Insulators journal August 2018
Multiple topological Dirac cones in a mixed-valent Kondo semimetal: g -SmS journal August 2019
Quantum Hall Ferroelectrics and Nematics in Multivalley Systems journal December 2017
Colloquium : Topological band theory journal June 2016
Classification of topological quantum matter with symmetries journal August 2016
Robust spin-polarized midgap states at step edges of topological crystalline insulators journal December 2016
Robust midgap states in band-inverted junctions under electric and magnetic fields journal January 2018
Quantum Coherent Transport in SnTe Topological Crystalline Insulator Thin Films text January 2014
Dirac mass generation from crystal symmetry breaking on the surfaces of topological crystalline insulators text January 2014
Electrically Tunable Quantum Spin Hall State in Topological Crystalline Insulator Thin films text January 2015
Theory of interacting topological crystalline insulators text January 2015
Topological Crystalline Insulator and Quantum Anomalous Hall States in IV-VI based Monolayers and their Quantum Wells text January 2015
Layered Topological Crystalline Insulators text January 2015
Classification of topological quantum matter with symmetries text January 2015
Quantum nonlinear Hall effect induced by Berry curvature dipole in time-reversal invariant materials text January 2015
Topological phase diagram and saddle point singularity in a tunable topological crystalline insulator text January 2015
A two-leg Su-Schrieffer-Heeger chain with glide reflection symmetry text January 2016
Imaging electronic states on topological semimetals using scanning tunneling microscopy text January 2016
Surface Magnetism in Topological Crystalline Insulators text January 2017
Symmetry-dependent topological phase transitions in PbTe layers preprint January 2017
Bulk characterization of topological crystalline insulators: stability under interactions and relations to symmetry enriched U(1) quantum spin liquids text January 2017
Quasiparticle interference on type-I and type-II Weyl semimetal surfaces: a review text January 2018
Spin Stiffness and Domain Walls in Dirac-Electron Mediated Magnets text January 2018
Multiple topological Dirac cones in a mixed-valent Kondo semimetal: g-SmS text January 2019
Robust spin-polarized midgap states at step edges of topological crystalline insulators text January 2016

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