Three-dimensionality of the bulk electronic structure in WTe2

Abstract

We use temperature- and field-dependent resistivity measurements [Shubnikov--de Haas (SdH) quantum oscillations] and ultrahigh resolution, tunable, vacuum ultraviolet (VUV) laser-based angle-resolved photoemission spectroscopy (ARPES) to study the three-dimensionality (3D) of the bulk electronic structure in WTe2, a type-II Weyl semimetal. The bulk Fermi surface (FS) consists of two pairs of electron pockets and two pairs of hole pockets along the X-Gamma-X direction as detected by using an incident photon energy of 6.7 eV, which is consistent with the previously reported data. However, if using an incident photon energy of 6.36 eV, another pair of tiny electron pockets is detected on both sides of the Gamma point, which is in agreement with the small quantum oscillation frequency peak observed in the magnetoresistance. Therefore, the bulk, 3D FS consists of three pairs of electron pockets and two pairs of hole pockets in total. With the ability of fine tuning the incident photon energy, we demonstrate the strong three-dimensionality of the bulk electronic structure in WTe2. The combination of resistivity and ARPES measurements reveal the complete, and consistent, picture of the bulk electronic structure of this material.

6 pages, 3 figures

References in corpus (5)

• Titanic Magnetoresistance in WTe2
• Weyl semimetal phase in non-centrosymmetric transition metal monophosphides
• Linear magnetoresistance caused by mobility fluctuations in the n-doped Cd3As2
• Electronic structure basis for the titanic magnetoresistance in WTe${}_2$
• Quantum oscillations, thermoelectric coefficients and the Fermi surface of semi-metallic WTe2

Cited by in corpus (17)

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• Optical evidence of type-II Weyl semimetals MoTe${}_2$ and WTe${}_2$
• Phenomenal magneto-elastoresistance of WTe${}_2$: strain engineering of electronic and quantum transport properties
• Nearly isotropic superconductivity in layered Weyl semimetal WTe${}_2$ at 98.5 kbar
• Angular dependence of the upper critical field in the high-pressure $1T^{\prime }$ phase of MoTe${}_2$
• Evidence of Electron-Hole Imbalance in WTe2 from High-Resolution Angle-Resolved Photoemission Spectroscopy
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• Thickness Dependence of Magneto-transport Properties in Tungsten Ditelluride
• A newly-designed femtosecond KBe${}_2$BO${}_3$F${}_2$ device with pulse duration down to 55 fs for time- and angle-resolved photoemission spectroscopy
• Highly Mobile Carriers in a Candidate of Quasi-Two-Dimensional Topological Semimetal AuTe${}_2$Br
• Geometry-induced spin-filtering in photoemission maps from WTe${}_2$ surface states
• Fractional corner charges in threefold-symmetric two-dimensional materials with fragile topology
• Selective observation of surface and bulk bands in polar WTe2 by laser-based spin- and angle-resolved photoemission spectroscopy
• A combined laser-based ARPES and 2PPES study of Td-WTe${}_2$