DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Two-dimensional topological crystalline insulator phase in Sb/Bi planar honeycomb with tunable Dirac gap

Journal Article · · Scientific Reports
DOI: https://doi.org/10.1038/srep18993 · OSTI ID:1238779
 [1];  [2];  [2];  [2];  [2];  [3];  [4];  [3];  [3];  [3];  [5]
  1. National Sun Yat-Sen Univ., Kaohsiung (Taiwan); Northeastern University
  2. National Sun Yat-Sen Univ., Kaohsiung (Taiwan)
  3. National Univ. of Singapore (Singapore)
  4. National Univ. of Singapore (Singapore); Northeastern Univ., Boston, MA (United States)
  5. Northeastern Univ., Boston, MA (United States)

We predict planar Sb/Bi honeycomb to harbor a two-dimensional (2D) topological crystalline insulator (TCI) phase based on first-principles computations. Although buckled Sb and Bi honeycombs support 2D topological insulator (TI) phases, their structure becomes planar under tensile strain. The planar Sb/Bi honeycomb structure restores the mirror symmetry, and is shown to exhibit non-zero mirror Chern numbers, indicating that the system can host topologically protected edge states. Our computations show that the electronic spectrum of a planar Sb/Bi nanoribbon with armchair or zigzag edges contains two Dirac cones within the band gap and an even number of edge bands crossing the Fermi level. Lattice constant of the planar Sb honeycomb is found to nearly match that of hexagonal-BN. As a result, the Sb nanoribbon on hexagonal-BN exhibits gapped edge states, which we show to be tunable by an out-of the-plane electric field, providing controllable gating of edge state important for device applications.

Research Organization:
Northeastern Univ., Boston, MA (United States); Energy Frontier Research Centers (EFRC) (United States). Center for the Computational Design of Functional Layered Materials (CCDM)
Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0012575
OSTI ID:
1238779
Journal Information:
Scientific Reports, Journal Name: Scientific Reports Vol. 6; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

References (54)

Prediction of Large-Gap Two-Dimensional Topological Insulators Consisting of Bilayers of Group III Elements with Bi journal April 2014
Prediction of Two-Dimensional Topological Crystalline Insulator in PbSe Monolayer journal September 2014
Correction: Corrigendum: Observation of a topological crystalline insulator phase and topological phase transition in Pb1−xSnxTe journal August 2016
Topological crystalline insulators in the SnTe material class journal January 2012
Predicted Growth of Two-Dimensional Topological Insulator Thin Films of III-V Compounds on Si(111) Substrate journal November 2015
Localized edge states in two-dimensional topological insulators: Ultrathin Bi films journal March 2011
Topological Crystalline Insulators journal March 2011
Quantum Spin Hall Effect in Silicene and Two-Dimensional Germanium journal August 2011
Large-Gap Quantum Spin Hall Insulators in Tin Films journal September 2013
Generalized Gradient Approximation Made Simple journal October 1996
Z2 Topological Order and the Quantum Spin Hall Effect journal September 2005
Gated Silicene as a tunable source of nearly 100% spin-polarized electrons text January 2013
Growth of topological crystalline insulator SnTe thin films on Si(111) substrate by molecular beam epitaxy journal March 2014
Robust Large Gap Two-Dimensional Topological Insulators in Hydrogenated III–V Buckled Honeycombs journal September 2015
Group IV Graphene- and Graphane-Like Nanosheets journal June 2011
First-Principles Study of Ferromagnetism in Two-Dimensional Silicene with Hydrogenation journal February 2012
Prediction of Large-Gap Two-Dimensional Topological Insulators Consisting of Bilayers of Group III Elements with Bi journal April 2014
Prediction of Two-Dimensional Topological Crystalline Insulator in PbSe Monolayer journal September 2014
Quantum spin Hall insulators and quantum valley Hall insulators of BiX/SbX (X=H, F, Cl and Br) monolayers with a record bulk band gap journal December 2014
Topological crystalline insulators in the SnTe material class journal January 2012
Observation of a topological crystalline insulator phase and topological phase transition in Pb1−xSnxTe journal January 2012
Gated silicene as a tunable source of nearly 100% spin-polarized electrons journal February 2013
Topological crystalline insulator states in Pb1−xSnxSe journal September 2012
Experimental realization of a topological crystalline insulator in SnTe journal September 2012
Mapping the unconventional orbital texture in topological crystalline insulators journal July 2014
Predicted Growth of Two-Dimensional Topological Insulator Thin Films of III-V Compounds on Si(111) Substrate journal November 2015
Tunable topological electronic structures in Sb(111) bilayers: A first-principles study journal January 2013
Topological crystalline insulator Pb x Sn 1-x Te thin films on SrTiO 3 (001) with tunable Fermi levels journal May 2014
The formation and electronic properties of hydrogenated bilayer silicene from first-principles journal July 2014
Strain driven topological phase transitions in atomically thin films of group IV and V elements in the honeycomb structures journal October 2014
Hydrogenated ultra-thin tin films predicted as two-dimensional topological insulators journal November 2014
The nontrivial electronic structure of Bi/Sb honeycombs on SiC(0001) journal February 2015
Inhomogeneous Electron Gas journal November 1964
Special points for Brillouin-zone integrations journal June 1976
Ab initiomolecular dynamics for liquid metals journal January 1993
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
Topological insulators with inversion symmetry journal July 2007
Localized edge states in two-dimensional topological insulators: Ultrathin Bi films journal March 2011
Quantum anomalous Hall effect with tunable Chern number in magnetic topological insulator film journal January 2012
Spin-polarized (001) surface states of the topological crystalline insulator Pb 0.73 Sn 0.27 Se journal March 2013
Nontrivial spin texture of the coaxial Dirac cones on the surface of topological crystalline insulator SnTe journal June 2013
Robustness of two-dimensional topological insulator states in bilayer bismuth against strain and electrical field journal June 2013
Nontrivial topological electronic structures in a single Bi(111) bilayer on different substrates: A first-principles study journal October 2013
Low-energy effective Hamiltonian for giant-gap quantum spin Hall insulators in honeycomb X -hydride/halide ( X = N – Bi ) monolayers journal August 2014
Topological Crystalline Insulators journal March 2011
Quantum Spin Hall Effect in Silicene and Two-Dimensional Germanium journal August 2011
Large-Gap Quantum Spin Hall Insulators in Tin Films journal September 2013
Generalized Gradient Approximation Made Simple journal October 1996
Z2 Topological Order and the Quantum Spin Hall Effect journal September 2005
Colloquium: Topological insulators journal November 2010
Topological insulators and superconductors journal October 2011
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
Topological Insulator Materials journal October 2013

Cited By (6)

Prediction of Quantum Anomalous Hall Insulator in half-fluorinated GaBi Honeycomb journal August 2016
Prediction of Quantum Anomalous Hall Effect in MBi and MSb (M:Ti, Zr, and Hf) Honeycombs journal February 2018
Ideal inert substrates for planar antimonene: h-BN and hydrogenated SiC(0001) journal January 2018
Prediction of two-dimensional organic topological insulator in metal-DCB lattices journal December 2018
Aperiodic topological crystalline insulators journal January 2020
Prediction of Quantum Anomalous Hall Effect in MBi and MSb (M:Ti, Zr, and Hf) Honeycombs journal February 2018

Similar Records

Chemically induced large-gap quantum anomalous Hall insulator states in III-Bi honeycombs
Journal Article · Tue Sep 26 04:00:00 UTC 2017 · npj Computational Materials · OSTI ID:1466811

Quantum anomalous Hall insulator phase in asymmetrically functionalized germanene
Journal Article · Mon Oct 16 04:00:00 UTC 2017 · Physical Review B · OSTI ID:1470301

Multiple topological Dirac cones in a mixed-valent Kondo semimetal: g -SmS
Journal Article · Thu Aug 15 04:00:00 UTC 2019 · Physical Review Materials · OSTI ID:1566818