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Title: Layer-dependent quantum cooperation of electron and hole states in the anomalous semimetal WTe2

Journal Article · · Nature Communications
DOI:https://doi.org/10.1038/ncomms10847· OSTI ID:1248810
 [1];  [2];  [3];  [3];  [4];  [5];  [6];  [6];  [7];  [3];  [8];  [6];  [5];  [6];  [3];  [6]
  1. Italian National Research Council, Trieste (Italy). Inst. of Materials (IOM); International Center for Theoretical Physics (ICTP), Trieste (Italy)
  2. Italian National Research Council, L'Aquila (Italy); Univ. of L'Aquila (Italy)
  3. Italian National Research Council, Trieste (Italy). Inst. of Materials (IOM)
  4. Hiroshima Univ. (Japan)
  5. Italian National Research Council, L'Aquila (Italy)
  6. Princeton Univ., NJ (United States)
  7. Brookhaven National Lab. (BNL), Upton, NY (United States)
  8. Italian National Research Council, Trieste (Italy). Inst. of Materials (IOM); Univ. of Milan (Italy)

The behaviour of electrons and holes in a crystal lattice is a fundamental quantum phenomenon, accounting for a rich variety of material properties. Boosted by the remarkable electronic and physical properties of two-dimensional materials such as graphene and topological insulators, transition metal dichalcogenides have recently received renewed attention. In this context, the anomalous bulk properties of semimetallic WTe2 have attracted considerable interest. We report angle- and spin-resolved photoemission spectroscopy of WTe2 single crystals, through which we disentangle the role of W and Te atoms in the formation of the band structure and identify the interplay of charge, spin and orbital degrees of freedom. Supported by first-principles calculations and high-resolution surface topography, we also reveal the existence of a layer-dependent behaviour. The balance of electron and hole states is found only when considering at least three Te–W–Te layers, showing that the behaviour of WTe2 is not strictly two dimensional.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC00112704
OSTI ID:
1248810
Report Number(s):
BNL-112085-2016-JA; R&D Project: MA015MACA; KC0201010
Journal Information:
Nature Communications, Vol. 7; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 83 works
Citation information provided by
Web of Science

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Cited By (28)

Performance of photoelectron spin polarimeters with continuous and pulsed sources: from storage rings to free electron lasers journal January 2017
Quantum oscillations of thermopower in WTe 2 thin films journal December 2019
Electronic properties of candidate type-II Weyl semimetal WTe 2 . A review perspective journal March 2019
A class of topological nodal rings and its realization in carbon networks journal March 2018
Tuning the magnetoresistance of ultrathin WTe 2 sheets by electrostatic gating journal January 2016
A Perspective on the Application of Spatially Resolved ARPES for 2D Materials journal April 2018
A Simple Method for Synthesis of High-Quality Millimeter-Scale 1T′ Transition-Metal Telluride and Near-Field Nanooptical Properties journal August 2017
Experimental progress on layered topological semimetals journal April 2019
All-electric magnetization switching and Dzyaloshinskii–Moriya interaction in WTe2/ferromagnet heterostructures journal August 2019
Three-Dimensional Electronic Structure of the Type-II Weyl Semimetal WTe 2 journal July 2017
Observation of topologically protected states at crystalline phase boundaries in single-layer WSe2 journal August 2018
Quantum spin Hall state in monolayer 1T'-WTe2 journal June 2017
Interband coherence response to electric fields in crystals: Berry-phase contributions and disorder effects journal July 2017
Nonlinear magnetotransport shaped by Fermi surface topology and convexity journal March 2019
Ultrafast broadband optical spectroscopy for quantifying subpicometric coherent atomic displacements in WTe 2 journal December 2019
Dynamics of out-of-equilibrium electron and hole pockets in the type-II Weyl semimetal candidate WTe 2 journal March 2018
Electrically Robust Single‐Crystalline WTe 2 Nanobelts for Nanoscale Electrical Interconnects journal December 2018
Spin splitting and electric field modulated electron-hole pockets in antimonene nanoribbons journal March 2017
Atomistic real-space observation of the van der Waals layered structure and tailored morphology in VSe 2 journal January 2019
Effect of aging-induced disorder on the quantum transport properties of few-layer WTe 2 journal December 2016
Tungsten dichalcogenides (WS 2 , WSe 2 , and WTe 2 ): materials chemistry and applications journal January 2017
Lateral Josephson effect on the surface of the magnetic Weyl semimetal Co 3 Sn 2 S 2 journal January 2020
Magnetron-sputtering deposited WTe_2for an ultrafast thulium-doped fiber laser journal January 2017
Compensated semimetal LaSb with unsaturated magnetoresistance text January 2016
A Class of topological nodal rings and its realization in carbon networks text January 2017
Observation of Topologically Protected States at Crystalline Phase Boundaries in Single-layer WSe2 text January 2018
Experimental Progress on Layered Topological Semimetals text January 2019
Angle-resolved photoemission spectroscopy for the study of two-dimensional materials journal March 2017

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