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

Title: Quantum spin Hall state in monolayer 1T'-WTe2

Abstract

A quantum spin Hall (QSH) insulator is a novel two-dimensional quantum state of matter that features quantized Hall conductance in the absence of a magnetic field, resulting from topologically protected dissipationless edge states that bridge the energy gap opened by band inversion and strong spin–orbit coupling. By investigating the electronic structure of epitaxially grown monolayer 1T'-WTe2 using angle-resolved photoemission (ARPES) and first-principles calculations, we observe clear signatures of topological band inversion and bandgap opening, which are the hallmarks of a QSH state. Scanning tunnelling microscopy measurements further confirm the correct crystal structure and the existence of a bulk bandgap, and provide evidence for a modified electronic structure near the edge that is consistent with the expectations for a QSH insulator. Finally, our results establish monolayer 1T'-WTe2 as a new class of QSH insulator with large band gap in a robust two-dimensional materials family of transition metal dichalcogenides (TMDCs).

Authors:
 [1];  [2];  [3];  [3];  [3];  [2];  [4];  [4];  [5];  [3];  [6];  [2];  [7]; ORCiD logo [7];  [2];  [8];  [9];  [10];  [11];  [12] more »;  [13];  [13];  [2];  [14]; ORCiD logo [10];  [2] « less
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES); Stanford Univ., CA (United States). Geballe Lab. for Advanced Materials; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS); Chinese Academy of Sciences (CAS), Shanghai (China). State Key Lab. of Functional Materials for Informatics, Shanghai Inst. of Microsystem and Information Technology; Shanghai Tech Univ., Shanghai (China). School of Physical Science and Technology
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES); Stanford Univ., CA (United States). Geballe Lab. for Advanced Materials
  3. Univ. of California, Berkeley, CA (United States). Dept.of Physics
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES)
  5. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS); Pohang Univ. of Science and Technology (POSTECH) (Korea, Republic of). Max Plank POSTECH Center for Complex Phase Materials; Pusan National Univ., Busan (Korea, Republic of). Dept. of Physics
  6. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS); Shanghai Tech Univ., Shanghai (China). School of Physical Science and Technology; Pohang Univ. of Science and Technology (POSTECH) (Korea, Republic of). Pohang Accelerator Lab.
  7. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)
  8. Pohang Univ. of Science and Technology (POSTECH) (Korea, Republic of). Pohang Accelerator Lab.
  9. Pusan National Univ., Busan (Korea, Republic of). Dept. of Physics
  10. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
  11. Univ. of Oxford (United Kingdom). Dept. of Physics and Clarendon Lab.
  12. Ikerbasque, Basque Foundation for Science, Bilbao (Spain); CIC nanoGUNE Research Centre, San Sebastian (Spain)
  13. Chinese Academy of Sciences (CAS), Shanghai (China). State Key Lab. of Functional Materials for Informatics, Shanghai Inst. of Microsystem and Information Technology; Shanghai Tech Univ., Shanghai (China). School of Physical Science and Technology
  14. Univ. of California, Berkeley, CA (United States). Dept.of Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division; Univ. of California, Berkeley, CA (United States). Kavli Energy Nano Sciences Inst.
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); National Natural Science Foundation of China (NSFC)
OSTI Identifier:
1373205
Alternate Identifier(s):
OSTI ID: 1437962
Grant/Contract Number:  
AC02-76SF00515; AC02-05CH11231; FA9550-14-1-0277; MAT2014-60996-R
Resource Type:
Accepted Manuscript
Journal Name:
Nature Physics
Additional Journal Information:
Journal Volume: 13; Journal Issue: 7; Journal ID: ISSN 1745-2473
Publisher:
Nature Publishing Group (NPG)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Tang, Shujie, Zhang, Chaofan, Wong, Dillon, Pedramrazi, Zahra, Tsai, Hsin-Zon, Jia, Chunjing, Moritz, Brian, Claassen, Martin, Ryu, Hyejin, Kahn, Salman, Jiang, Juan, Yan, Hao, Hashimoto, Makoto, Lu, Donghui, Moore, Robert G., Hwang, Chan-Cuk, Hwang, Choongyu, Hussain, Zahid, Chen, Yulin, Ugeda, Miguel M., Liu, Zhi, Xie, Xiaoming, Devereaux, Thomas P., Crommie, Michael F., Mo, Sung-Kwan, and Shen, Zhi-Xun. Quantum spin Hall state in monolayer 1T'-WTe2. United States: N. p., 2017. Web. doi:10.1038/NPHYS4174.
Tang, Shujie, Zhang, Chaofan, Wong, Dillon, Pedramrazi, Zahra, Tsai, Hsin-Zon, Jia, Chunjing, Moritz, Brian, Claassen, Martin, Ryu, Hyejin, Kahn, Salman, Jiang, Juan, Yan, Hao, Hashimoto, Makoto, Lu, Donghui, Moore, Robert G., Hwang, Chan-Cuk, Hwang, Choongyu, Hussain, Zahid, Chen, Yulin, Ugeda, Miguel M., Liu, Zhi, Xie, Xiaoming, Devereaux, Thomas P., Crommie, Michael F., Mo, Sung-Kwan, & Shen, Zhi-Xun. Quantum spin Hall state in monolayer 1T'-WTe2. United States. https://doi.org/10.1038/NPHYS4174
Tang, Shujie, Zhang, Chaofan, Wong, Dillon, Pedramrazi, Zahra, Tsai, Hsin-Zon, Jia, Chunjing, Moritz, Brian, Claassen, Martin, Ryu, Hyejin, Kahn, Salman, Jiang, Juan, Yan, Hao, Hashimoto, Makoto, Lu, Donghui, Moore, Robert G., Hwang, Chan-Cuk, Hwang, Choongyu, Hussain, Zahid, Chen, Yulin, Ugeda, Miguel M., Liu, Zhi, Xie, Xiaoming, Devereaux, Thomas P., Crommie, Michael F., Mo, Sung-Kwan, and Shen, Zhi-Xun. Mon . "Quantum spin Hall state in monolayer 1T'-WTe2". United States. https://doi.org/10.1038/NPHYS4174. https://www.osti.gov/servlets/purl/1373205.
@article{osti_1373205,
title = {Quantum spin Hall state in monolayer 1T'-WTe2},
author = {Tang, Shujie and Zhang, Chaofan and Wong, Dillon and Pedramrazi, Zahra and Tsai, Hsin-Zon and Jia, Chunjing and Moritz, Brian and Claassen, Martin and Ryu, Hyejin and Kahn, Salman and Jiang, Juan and Yan, Hao and Hashimoto, Makoto and Lu, Donghui and Moore, Robert G. and Hwang, Chan-Cuk and Hwang, Choongyu and Hussain, Zahid and Chen, Yulin and Ugeda, Miguel M. and Liu, Zhi and Xie, Xiaoming and Devereaux, Thomas P. and Crommie, Michael F. and Mo, Sung-Kwan and Shen, Zhi-Xun},
abstractNote = {A quantum spin Hall (QSH) insulator is a novel two-dimensional quantum state of matter that features quantized Hall conductance in the absence of a magnetic field, resulting from topologically protected dissipationless edge states that bridge the energy gap opened by band inversion and strong spin–orbit coupling. By investigating the electronic structure of epitaxially grown monolayer 1T'-WTe2 using angle-resolved photoemission (ARPES) and first-principles calculations, we observe clear signatures of topological band inversion and bandgap opening, which are the hallmarks of a QSH state. Scanning tunnelling microscopy measurements further confirm the correct crystal structure and the existence of a bulk bandgap, and provide evidence for a modified electronic structure near the edge that is consistent with the expectations for a QSH insulator. Finally, our results establish monolayer 1T'-WTe2 as a new class of QSH insulator with large band gap in a robust two-dimensional materials family of transition metal dichalcogenides (TMDCs).},
doi = {10.1038/NPHYS4174},
journal = {Nature Physics},
number = 7,
volume = 13,
place = {United States},
year = {2017},
month = {6}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 62 works
Citation information provided by
Web of Science

Figures / Tables:

Fig. 1 Fig. 1: Topological phase transition in 1T’-WTe2. (a) Crystal structure of 1T’-WTe2. The doubled period due to the spontaneous lattice distortion from 1T phase is indicated by the red rectangle. (b) Schematic diagram to show the bulk band evolution from a topologically trivial phase, to a non-trivial phase, and thenmore » to a bulk band opening due to SOC. Calculated band structures for WTe2 to show the evolution from (c) 1T-WTe2 along ΓY direction, (d) 1T’-WTe2 without SOC, and (e) 1T’-WTe2 with SOC. Red and blue dotted bands highlight the two bands involved in band inversion, which mainly contain the 5d$_z{^2}$ and 5dxz orbital contents, respectively. + and - signs denote the parity of the Bloch states at the Γ point.« less

Save / Share:

Works referenced in this record:

One-Dimensional Edge States with Giant Spin Splitting in a Bismuth Thin Film
journal, February 2015


Topological edge states in a high-temperature superconductor FeSe/SrTiO3(001) film
journal, July 2016

  • Wang, Z. F.; Zhang, Huimin; Liu, Defa
  • Nature Materials, Vol. 15, Issue 9
  • DOI: 10.1038/nmat4686

Understanding topological phase transition in monolayer transition metal dichalcogenides
journal, March 2016


Direct observation of the transition from indirect to direct bandgap in atomically thin epitaxial MoSe2
journal, December 2013


Topological insulators with inversion symmetry
journal, July 2007


Quantum Spin Hall Insulator State in HgTe Quantum Wells
journal, November 2007


Quantum Spin Hall Effect in Graphene
journal, November 2005


Colloquium: Topological insulators
journal, November 2010


Bandgap opening in few-layered monoclinic MoTe2
journal, May 2015

  • Keum, Dong Hoon; Cho, Suyeon; Kim, Jung Ho
  • Nature Physics, Vol. 11, Issue 6
  • DOI: 10.1038/nphys3314

Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
journal, December 2006

  • Bernevig, B. A.; Hughes, T. L.; Zhang, S.-C.
  • Science, Vol. 314, Issue 5806, p. 1757-1761
  • DOI: 10.1126/science.1133734

Quantum Spin Hall Effect in Inverted Type-II Semiconductors
journal, June 2008


Large-scale uniform bilayer graphene prepared by vacuum graphitization of 6H-SiC(0001) substrates
journal, January 2013


Imaging currents in HgTe quantum wells in the quantum spin Hall regime
journal, June 2013

  • Nowack, Katja C.; Spanton, Eric M.; Baenninger, Matthias
  • Nature Materials, Vol. 12, Issue 9
  • DOI: 10.1038/nmat3682

On the Quantum Spin Hall Gap of Monolayer 1T′-WTe 2
journal, April 2016


Large-Gap Quantum Spin Hall Insulators in Tin Films
journal, September 2013


Bulk-boundary correspondence of topological insulators from their respective Green’s functions
journal, September 2011


Quantum spin Hall effect in two-dimensional transition metal dichalcogenides
journal, November 2014


Stable Nontrivial Z 2 Topology in Ultrathin Bi (111) Films: A First-Principles Study
journal, September 2011


Evidence for Helical Edge Modes in Inverted InAs / GaSb Quantum Wells
journal, September 2011


Characterization of collective ground states in single-layer NbSe2
journal, November 2015

  • Ugeda, Miguel M.; Bradley, Aaron J.; Zhang, Yi
  • Nature Physics, Vol. 12, Issue 1
  • DOI: 10.1038/nphys3527

Topological Dangling Bonds with Large Spin Splitting and Enhanced Spin Polarization on the Surfaces of Bi 2 Se 3
journal, April 2013

  • Lin, Hsin; Das, Tanmoy; Okada, Yoshinori
  • Nano Letters, Vol. 13, Issue 5
  • DOI: 10.1021/nl304099x

One-dimensional topological edge states of bismuth bilayers
journal, August 2014

  • Drozdov, Ilya K.; Alexandradinata, A.; Jeon, Sangjun
  • Nature Physics, Vol. 10, Issue 9
  • DOI: 10.1038/nphys3048

Large-gap quantum spin Hall states in decorated stanene grown on a substrate
journal, August 2015


Edge transport in the trivial phase of InAs/GaSb
journal, July 2016


Epitaxial growth of two-dimensional stanene
journal, August 2015

  • Zhu, Feng-feng; Chen, Wei-jiong; Xu, Yong
  • Nature Materials, Vol. 14, Issue 10
  • DOI: 10.1038/nmat4384

STM/AFM investigations of β-MoTe2, α-MoTe2 and WTe2
journal, May 1996


Signature of Strong Spin-Orbital Coupling in the Large Nonsaturating Magnetoresistance Material WTe 2
journal, October 2015


Subnanometre-wide electron channels protected by topology
journal, March 2015

  • Pauly, Christian; Rasche, Bertold; Koepernik, Klaus
  • Nature Physics, Vol. 11, Issue 4
  • DOI: 10.1038/nphys3264

Giant phonon-induced conductance in scanning tunnelling spectroscopy of gate-tunable graphene
journal, July 2008

  • Zhang, Yuanbo; Brar, Victor W.; Wang, Feng
  • Nature Physics, Vol. 4, Issue 8
  • DOI: 10.1038/nphys1022

Unexpected edge conduction in mercury telluride quantum wells under broken time-reversal symmetry
journal, May 2015

  • Ma, Eric Yue; Calvo, M. Reyes; Wang, Jing
  • Nature Communications, Vol. 6, Issue 1
  • DOI: 10.1038/ncomms8252

Layer-dependent quantum cooperation of electron and hole states in the anomalous semimetal WTe2
journal, February 2016

  • Das, Pranab Kumar; Di Sante, D.; Vobornik, I.
  • Nature Communications, Vol. 7, Issue 1
  • DOI: 10.1038/ncomms10847

Quantum Spin Hall Effect in Inverted Type II Semiconductors
text, January 2008


One-Dimensional Edge States with Giant Spin Splitting in a Bismuth Thin Film
text, January 2015


Epitaxial Growth of Two-Dimensional Stanene
text, January 2015


Characterization of collective ground states in single-layer NbSe2
text, January 2015


On the quantum spin Hall gap of monolayer 1T'-WTe2
text, January 2016


Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
text, January 2006


Works referencing / citing this record:

2D Layered Material-Based van der Waals Heterostructures for Optoelectronics
journal, January 2018

  • Zhou, Xing; Hu, Xiaozong; Yu, Jing
  • Advanced Functional Materials, Vol. 28, Issue 14
  • DOI: 10.1002/adfm.201706587

Van der Waals Heterostructures for High‐Performance Device Applications: Challenges and Opportunities
journal, October 2019


Phase Transition and Superconductivity Enhancement in Se‐Substituted MoTe 2 Thin Films
journal, October 2019


Metastable MoS 2 : Crystal Structure, Electronic Band Structure, Synthetic Approach and Intriguing Physical Properties
journal, August 2018

  • Zhao, Wei; Pan, Jie; Fang, Yuqiang
  • Chemistry - A European Journal, Vol. 24, Issue 60
  • DOI: 10.1002/chem.201801018

Experimental Observation of Bound States of 2D Dirac Electrons at Surface Steps of the Topological Insulator Bi 2 Se 3
journal, January 2019

  • Fedotov, Nikolai; Zaitsev‐Zotov, Sergei
  • physica status solidi (RRL) – Rapid Research Letters, Vol. 13, Issue 5
  • DOI: 10.1002/pssr.201800617

The Xenes Generations: A Taxonomy of Epitaxial Single‐Element 2D Materials
journal, September 2019

  • Grazianetti, Carlo; Martella, Christian; Molle, Alessandro
  • physica status solidi (RRL) – Rapid Research Letters, Vol. 14, Issue 2
  • DOI: 10.1002/pssr.201900439

Layered Topological Insulators and Semimetals for Magnetoresistance Type Sensors
journal, December 2018


Recent Advances in Quantum Effects of 2D Materials
journal, April 2019

  • Yi, Ya; Chen, Zhanxu; Yu, Xue‐Feng
  • Advanced Quantum Technologies, Vol. 2, Issue 5-6
  • DOI: 10.1002/qute.201800111

Quantum Spin Hall Materials
journal, July 2019


Dephasing effects in topological insulators
journal, June 2019


Growth of atomically thick transition metal sulfide filmson graphene/6H-SiC(0001) by molecular beam epitaxy
journal, April 2018


Towards properties on demand in quantum materials
journal, October 2017

  • Basov, D. N.; Averitt, R. D.; Hsieh, D.
  • Nature Materials, Vol. 16, Issue 11
  • DOI: 10.1038/nmat5017

Observation of topological states residing at step edges of WTe2
journal, September 2017


Large quantum-spin-Hall gap in single-layer 1T′ WSe2
journal, May 2018


Observation of topologically protected states at crystalline phase boundaries in single-layer WSe2
journal, August 2018


Observation of Coulomb gap in the quantum spin Hall candidate single-layer 1T’-WTe2
journal, October 2018


Nonlinear magnetotransport shaped by Fermi surface topology and convexity
journal, March 2019


Transport evidence of asymmetric spin–orbit coupling in few-layer superconducting 1Td-MoTe2
journal, May 2019


Magnetic proximity and nonreciprocal current switching in a monolayer WTe2 helical edge
journal, March 2020


Electron quantum metamaterials in van der Waals heterostructures
journal, November 2018


Electrically switchable Berry curvature dipole in the monolayer topological insulator WTe2
journal, July 2018


Evidence of anisotropic Majorana bound states in 2M-WS2
journal, July 2019


Tomonaga–Luttinger liquid in the edge channels of a quantum spin Hall insulator
journal, October 2019


Strong correlations and orbital texture in single-layer 1T-TaSe2
journal, January 2020


Visualizing electronic structures of quantum materials by angle-resolved photoemission spectroscopy
journal, August 2018


Ferroelectric switching of a two-dimensional metal
journal, July 2018


Observation of the nonlinear Hall effect under time-reversal-symmetric conditions
journal, December 2018


Visualizing electrostatic gating effects in two-dimensional heterostructures
journal, July 2019


Growth and Thermo-driven Crystalline Phase Transition of Metastable Monolayer 1T′-WSe2 Thin Film
journal, February 2019


Nonlayered tellurene as an elemental 2D topological insulator: experimental evidence from scanning tunneling spectroscopy
journal, January 2019

  • Khatun, Salma; Banerjee, Arnab; Pal, Amlan J.
  • Nanoscale, Vol. 11, Issue 8
  • DOI: 10.1039/c8nr09760g

High throughput study on magnetic ground states with Hubbard U corrections in transition metal dihalide monolayers
journal, January 2020

  • Li, Xinru; Zhang, Zeying; Zhang, Hongbin
  • Nanoscale Advances, Vol. 2, Issue 1
  • DOI: 10.1039/c9na00588a

Vertical ferroelectric switching by in-plane sliding of two-dimensional bilayer WTe 2
journal, January 2019


Negative differential resistance observed on the charge density wave of a transition metal dichalcogenide
journal, January 2019

  • Luican-Mayer, Adina; Zhang, Yuan; DiLullo, Andrew
  • Nanoscale, Vol. 11, Issue 46
  • DOI: 10.1039/c9nr07857f

Observation of superconductivity in pressurized 2M WSe 2 crystals
journal, January 2019

  • Fang, Yuqiang; Dong, Qing; Pan, Jie
  • Journal of Materials Chemistry C, Vol. 7, Issue 28
  • DOI: 10.1039/c9tc02417d

Electronic structure of monolayer 1T′-MoTe 2 grown by molecular beam epitaxy
journal, February 2018

  • Tang, Shujie; Zhang, Chaofan; Jia, Chunjing
  • APL Materials, Vol. 6, Issue 2
  • DOI: 10.1063/1.5004700

Transport properties of a few nanometer-thick TiSe 2 films grown by molecular-beam epitaxy
journal, August 2018

  • Wang, Yue; Nakano, Masaki; Kashiwabara, Yuta
  • Applied Physics Letters, Vol. 113, Issue 7
  • DOI: 10.1063/1.5039493

Experimental observation of conductive edge states in weak topological insulator candidate HfTe 5
journal, December 2018

  • Liu, S.; Wang, M. X.; Chen, C.
  • APL Materials, Vol. 6, Issue 12
  • DOI: 10.1063/1.5050847

Observation of Shubnikov-de Haas Oscillations in Large-Scale Weyl Semimetal WTe 2 Films
journal, January 2020


Numerical analysis of surface and edge states in slabs, stripes, rods and surface steps of topological insulators
journal, November 2018

  • Fedotov, N. I.; Zaitsev-Zotov, S. V.
  • Journal of Physics: Condensed Matter, Vol. 30, Issue 48
  • DOI: 10.1088/1361-648x/aae9d7

Band structure engineering in 3D topological insulators
journal, March 2019


Qsymm: algorithmic symmetry finding and symmetric Hamiltonian generation
journal, September 2018

  • Varjas, Dániel; Rosdahl, Tómas Ö; Akhmerov, Anton R.
  • New Journal of Physics, Vol. 20, Issue 9
  • DOI: 10.1088/1367-2630/aadf67

Enhanced lifetimes of spin chains coupled to chiral edge states
journal, April 2019


Multi-carrier transport in ZrTe 5 film
journal, August 2018


Single-layer 1 T ′-MoS 2 under electron irradiation from ab initio molecular dynamics
journal, March 2018


Few-layer 1T′ MoTe 2 as gapless semimetal with thickness dependent carrier transport
journal, June 2018


Electrically tuneable nonlinear anomalous Hall effect in two-dimensional transition-metal dichalcogenides WTe 2 and MoTe 2
journal, July 2018


Experimental progress on layered topological semimetals
journal, April 2019


Thermodynamically stable octahedral MoS 2 in van der Waals hetero-bilayers
journal, July 2019


Spacing dependent and cation doping independent superconductivity in intercalated 1T 2D SnSe 2
journal, September 2019


Electronic properties of candidate type-II Weyl semimetal WTe 2 . A review perspective
journal, March 2019


Pseudospin triplet superconductivity in 2 H -type transition-metal dichalcogenide monolayers
journal, October 2019


Quantum oscillations of thermopower in WTe 2 thin films
journal, December 2019


First-principles study of charge and magnetic ordering in monolayer NbSe 2
journal, February 2018


Nontrivial interplay of strong disorder and interactions in quantum spin-Hall insulators doped with dilute magnetic impurities
journal, June 2018


Emergence of Floquet behavior for lattice fermions driven by light pulses
journal, July 2018


Symmetry, spin-texture, and tunable quantum geometry in a WTe 2 monolayer
journal, January 2019


Spin-orbit interaction induced in graphene by transition metal dichalcogenides
journal, June 2019


Three-Dimensional Electronic Structure of the Type-II Weyl Semimetal WTe 2
journal, July 2017


Prediction of a Large-Gap and Switchable Kane-Mele Quantum Spin Hall Insulator
journal, March 2018


Band Signatures for Strong Nonlinear Hall Effect in Bilayer WTe 2
journal, December 2018


Bulk and Surface Electronic Structure of the Dual-Topology Semimetal Pt 2 HgSe 3
journal, March 2020


Thickness dependent electronic structure of exfoliated mono- and few-layer 1 T MoTe 2
journal, October 2018


Influence of lattice termination on the edge states of the quantum spin Hall insulator monolayer 1 T WTe 2
journal, May 2019


Detection of second-order topological superconductors by Josephson junctions
journal, January 2020


Large thermoelectric power factor of high-mobility transition-metal dichalcogenides with 1 T phase
journal, February 2020


Quantum spin Hall insulator with a large bandgap, Dirac fermions, and bilayer graphene analog
journal, April 2018


Imaging quantum spin Hall edges in monolayer WTe 2
journal, February 2019


Gate tuning from exciton superfluid to quantum anomalous Hall in van der Waals heterobilayer
journal, January 2019

  • Zhu, Qizhong; Tu, Matisse Wei-Yuan; Tong, Qingjun
  • Science Advances, Vol. 5, Issue 1
  • DOI: 10.1126/sciadv.aau6120

Discovering the forbidden Raman modes at the edges of layered materials
journal, December 2018


Evidence for a quantum spin Hall phase in graphene decorated with Bi 2 Te 3 nanoparticles
journal, November 2018


Gate-induced superconductivity in a monolayer topological insulator
journal, October 2018


Electrically tunable low-density superconductivity in a monolayer topological insulator
journal, October 2018


A Scanning Tunneling Microscopy Study of Monolayer and Bilayer Transition-Metal Dichalcogenides Grown by Molecular-Beam Epitaxy
journal, December 2018


Quantum Spin Hall Insulators in Tin Films: Beyond Stanene
journal, December 2019


Remarkable electronic and optical anisotropy of layered 1T’-WTe 2 2D materials
journal, January 2019

  • Zhang, Qiankun; Zhang, Rongjie; Chen, Jiancui
  • Beilstein Journal of Nanotechnology, Vol. 10
  • DOI: 10.3762/bjnano.10.170

Versatile Crystal Structures and (Opto)electronic Applications of the 2D Metal Mono‐, Di‐, and Tri‐Chalcogenide Nanosheets
journal, March 2019


Discovery of Superconductivity in 2M WS 2 with Possible Topological Surface States
journal, June 2019


Dirac Fermion and Plasmon Dynamics in Graphene and 3D Topological Insulators
journal, April 2019


Nonlinear anomalous Hall effect in few-layer WTe2
journal, February 2019


Directional massless Dirac fermions in a layered van der Waals material with one-dimensional long-range order
journal, October 2019


Electric-field-tuned topological phase transition in ultrathin Na3Bi
journal, December 2018


van der Waals heterostructures combining graphene and hexagonal boron nitride
journal, January 2019

  • Yankowitz, Matthew; Ma, Qiong; Jarillo-Herrero, Pablo
  • Nature Reviews Physics, Vol. 1, Issue 2
  • DOI: 10.1038/s42254-018-0016-0

Bi 2 Se 3 topological insulator at the 2D-limit: role of halide-doping on Dirac point
journal, January 2018

  • Khatun, Salma; Bhunia, Hrishikesh; Pal, Amlan J.
  • Physical Chemistry Chemical Physics, Vol. 20, Issue 26
  • DOI: 10.1039/c8cp02604a

Discovery of asymmetric NaXBi (X= Sn /Pb) monolayers with non-trivial topological properties
journal, January 2018

  • Jia, Yi-zhen; Ji, Wei-xiao; Zhang, Chang-wen
  • RSC Advances, Vol. 8, Issue 49
  • DOI: 10.1039/c8ra05458d

Topological phase transition induced by p x,y and p z band inversion in a honeycomb lattice
journal, January 2019

  • Zhang, Huisheng; Ning, Yaohui; Yang, Wenjia
  • Nanoscale, Vol. 11, Issue 29
  • DOI: 10.1039/c9nr04268g

Tuning spin–orbit coupling in 2D materials for spintronics: a topical review
journal, March 2019

  • Premasiri, Kasun; Gao, Xuan P. A.
  • Journal of Physics: Condensed Matter, Vol. 31, Issue 19
  • DOI: 10.1088/1361-648x/ab04c7

Epitaxial growth and electronic properties of few-layer stanene on InSb (1 1 1)
journal, October 2019


Two-dimensional topological materials discovery by symmetry-indicator method
journal, November 2019


Unified picture of lattice instabilities in metallic transition metal dichalcogenides
journal, November 2019


Dual topological insulator and insulator-semimetal transition in mirror-symmetric honeycomb materials
journal, November 2019


Quantization of spin Hall conductivity in two-dimensional topological insulators versus symmetry and spin-orbit interaction
journal, December 2019


Temperature-dependent terahertz spectroscopy of inverted-band three-layer InAs/GaSb/InAs quantum well
journal, June 2018


Time-Reversal Symmetry-Breaking Nematic Insulators near Quantum Spin Hall Phase Transitions
journal, May 2018


Spin and Charge Transport of Multiorbital Quantum Spin Hall Insulators
journal, May 2019


Higher-Order Topology, Monopole Nodal Lines, and the Origin of Large Fermi Arcs in Transition Metal Dichalcogenides X Te 2 ( X = Mo , W )
journal, October 2019


Ion intercalation engineering of electronic properties of two-dimensional crystals of 2 H TaSe 2
journal, October 2019


Observation of the quantum spin Hall effect up to 100 kelvin in a monolayer crystal
journal, January 2018


Raman spectrum of layered jacutingaite (Pt 2 HgSe 3 ) crystals—Experimental and theoretical study
journal, November 2019

  • Longuinhos, Raphael; Vymazalová, Anna; Cabral, Alexandre R.
  • Journal of Raman Spectroscopy, Vol. 51, Issue 2
  • DOI: 10.1002/jrs.5764

Low temperature epitaxy of tungsten–telluride heterostructure films
journal, January 2019

  • Vermeulen, Paul Alexander; Momand, Jamo; Kooi, Bart Jan
  • CrystEngComm, Vol. 21, Issue 22
  • DOI: 10.1039/c9ce00338j

Electronic properties of polymorphic two-dimensional layered chromium disulphide
journal, January 2019

  • Habib, Mohammad Rezwan; Wang, Shengping; Wang, Weijia
  • Nanoscale, Vol. 11, Issue 42
  • DOI: 10.1039/c9nr04449c

Varying topological properties of two-dimensional honeycomb lattices composed of endohedral fullerenes
journal, July 2019


Bulk and Surface Electronic Structure of the Dual-Topology Semimetal Pt$_2$ HgSe$_3$
text, January 2020


The Xenes Generations: A Taxonomy of Epitaxial Single‐Element 2D Materials
journal, September 2019

  • Grazianetti, Carlo; Martella, Christian; Molle, Alessandro
  • physica status solidi (RRL) – Rapid Research Letters, Vol. 14, Issue 2
  • DOI: 10.1002/pssr.202070013

Atomic structure of defects and dopants in 2D layered transition metal dichalcogenides
journal, January 2018

  • Wang, Shanshan; Robertson, Alex; Warner, Jamie H.
  • Chemical Society Reviews, Vol. 47, Issue 17
  • DOI: 10.1039/c8cs00236c

Berry curvature dipole current in the transition metal dichalcogenides family
journal, September 2018


Evidence for a narrow band gap phase in 1T′ WS 2 nanosheet
journal, July 2019

  • Pierucci, Debora; Zribi, Jihene; Livache, Clément
  • Applied Physics Letters, Vol. 115, Issue 3
  • DOI: 10.1063/1.5091997

Multi-carrier transport in ZrTe5 film
text, January 2018


Gate-induced superconductivity in a monolayer topological insulator
text, January 2018


Enhanced lifetimes of spin chains coupled to chiral edge states
text, January 2018


Gate tuning from exciton superfluid to quantum anomalous Hall in van der Waals heterobilayer
text, January 2018


Experimental Progress on Layered Topological Semimetals
text, January 2019


Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.