Raman scattering investigation of large positive magnetoresistance material WTe${}_2$

Abstract

We have performed polarized Raman scattering measurements on WTe${}_2$, for which an extremely large positive magnetoresistance has been reported recently. We observe 5 A${}_1$ phonon modes and 2 A${}_2$ phonon modes out of 33 Raman active modes, with frequencies in good accordance with first-principles calculations. The angular dependence of the intensity of the peaks observed is consistent with the Raman tensors of the $C_{2v}$ point group symmetry attributed to WTe${}_2$. Although the phonon spectra suggest neither strong electron-phonon nor spin-phonon coupling, the intensity of the A${}_1$ phonon mode at 160.6 cm${}^{-1}$ shows an unconventional decrease with temperature decreasing, for which the origin remains unclear.

arXiv comment4 pages, 3 figures, 2 tables. Resistivity scale in Fig. 1 normalized

References in corpus (7)

• Phonons and related properties of extended systems from density-functional perturbation theory
• Titanic Magnetoresistance in WTe2
• Electronic structure basis for the titanic magnetoresistance in WTe${}_2$
• Metal-Insulator-Like Behavior in Semimetallic Bismuth and Graphite
• Reentrant Metallic Behavior of Graphite in the Quantum Limit
• Raman scattering investigation of the electron-phonon coupling in superconducting Nd(O,F)BiS${}_2$
• Raman scattering investigation of superconducting Ba${}_2$Ti${}_2$Fe${}_2$As${}_4$O

Cited by in corpus (23)

• Control of spin-orbit torques through crystal symmetry in WTe2/ferromagnet bilayers
• Pressure-driven dome-shaped superconductivity and electronic structural evolution in tungsten ditelluride
• Gate-Tunable Negative Longitudinal Magnetoresistance in the Predicted Type-II Weyl Semimetal WTe2
• On the quantum spin Hall gap of monolayer 1T'-WTe2
• Tuning Magnetotransport in a Compensated Semimetal at the Atomic Scale
• Raman fingerprint of semi-metal WTe2 from bulk to monolayer
• Temperature dependent three-dimensional anisotropy of the magnetoresistance in WTe${}_2$
• Origin of the superconductivity of WTe2 under pressure
• Optical properties of the perfectly compensated semimetal WTe${}_2$
• Ultrafast Carrier Dynamics in the Large Magnetoresistance Material WTe${}_2$
• Raman Signatures of Broken Inversion Symmetry and In-plane Anisotropy in Type-II Weyl Semimetal Candidate TaIrTe4
• Mode-resolved reciprocal space mapping of electron-phonon interaction in the Weyl semimetal candidate Td-WTe${}_2$
• Nonlinear magnetotransport shaped by Fermi surface topology and convexity in WTe2
• Growth, stabilization and conversion of semi-metallic and semiconducting phases of MoTe2 monolayer by molecular-beam epitaxy
• Single- and Few-Layer WTe2 and Their Suspended Nanostructures: Raman Signatures and Nanomechanical Resonances
• First-Principles Study of Lattice Thermal Conductivity of Td-WTe2
• Determination of the thickness and orientation of few-layer tungsten ditelluride using polarized Raman spectroscopy
• Observation of Shubnikov-de Haas Oscillations in Large-Scale Weyl Semimetal WTe2 Films
• Direct Observation of Long-range field-effect from gate tuning of non-local conductivity
• Raman spectrum of 1T'-WTe2 under tensile strain: A first-principles prediction
• Gate Tunable Magneto-resistance of Ultra-Thin WTe2 Devices
• Raman Digital Twin of Monolayer Janus Transition Metal Dichalcogenides
• The out-of-plane magnetoresistance in a Van der Waals thin film of WTe2