Electron-hole balanced dynamics in the type-II Weyl semimetal candidate WTe2

Abstract

We present a time- and angular-resolved photoemission (TR-ARPES) study of the transition- metal dichalcogenide WTe2, a candidate type II Weyl semimetal exhibiting extremely large magne- toresistence. Using femtosecond light pulses, we characterize the unoccupied states of the electron pockets above the Fermi level. We track the relaxation dynamics of photoexcited electrons along the unoccupied band structure and into a bulk hole pocket. Following the ultrafast carrier relaxation, we report remarkably similar decay dynamics for electrons and holes. Our results corroborate the hypothesis that carrier compensation is a key factor in the exceptional magnetotransport properties of WTe2.

References in corpus (29)

• Electronic Structure of Pyrochlore Iridates: From Topological Dirac Metal to Mott Insulator
• Discovery of a Weyl Fermion Semimetal and Topological Fermi Arcs
• Type-II Weyl Semimetals
• Experimental discovery of Weyl semimetal TaAs
• Titanic Magnetoresistance in WTe2
• Ultrahigh mobility and giant magnetoresistance in the Dirac semimetal Cd${}_3$As${}_2$
• Extremely large magnetoresistance and ultrahigh mobility in the topological Weyl semimetal NbP
• Observation of Weyl nodes in TaAs
• Experimental observation of topological Fermi arcs in type-II Weyl semimetal MoTe2
• Prediction of the Weyl semimetal in the orthorhombic MoTe2
• Spectroscopic evidence for type II Weyl semimetal state in MoTe2
• Snapshots of non-equilibrium Dirac carrier distributions in graphene
• Direct view on the ultrafast carrier dynamics in graphene
• Ultrafast Optical Excitation of a Persistent Surface-State Population in the Topological Insulator Bi2Se3
• Observation of Fermi Arcs in Type-II Weyl Semimetal Candidate WTe2
• Discovery of Dirac Node Arcs in PtSn4
• Arc-tunable Weyl Fermion metallic state in Mo${}_x$W${}_{1-x}$Te${}_2$
• Electronic structure basis for the titanic magnetoresistance in WTe${}_2$
• Fermi arcs and their topological character in the candidate type-II Weyl semimetal MoTe2
• Ultrafast surface carrier dynamics in the topological insulator Bi2Te3
• Spectroscopic Evidence of Type II Weyl Semimetal State in WTe2
• Observation of Large Topologically Trivial Fermi-Arcs in the Candidate Type-II Weyl Semimetal WTe2
• Robust Type-II Weyl Semimetal Phase in Transition Metal Diphosphides XP${}_2$ (X = Mo, W)
• Measuring Chern numbers above the Fermi level in the Type II Weyl semimetal Mo${}_x$W${}_{1-x}$Te${}_2$
• Tuning a Schottky barrier in a photoexcited topological insulator with transient Dirac cone electron-hole asymmetry
• Spin Texture in Type-II Weyl Semimetal WTe2
• Ultrafast Carrier Dynamics in the Large Magnetoresistance Material WTe${}_2$
• Three-Dimensional Electronic Structure of type-II Weyl Semimetal WTe${}_2$
• Electronic Evidence for Type II Weyl Semimetal State in MoTe2

Cited by in corpus (20)

• Time- and Angle-Resolved Photoemission Studies of Quantum Materials
• Time- and momentum-resolved photoemission studies using time-of-flight momentum microscopy at a free-electron laser
• Mode-resolved reciprocal space mapping of electron-phonon interaction in the Weyl semimetal candidate Td-WTe${}_2$
• Direct evidence for charge compensation induced large magnetoresistance in thin WTe2
• Electronic properties of type-II Weyl semimetal WTe${}_2$. A review perspective
• Spin- and angle-resolved photoemission on topological materials
• Experimental Progress on Layered Topological Semimetals
• Accessing the spectral function of in operando devices by angle-resolved photoemission spectroscopy
• Spin-, time- and angle-resolved photoemission spectroscopy on WTe${}_2$
• Photo-induced anomalous Hall effect in the type-II Weyl-semimetal WTe2 at room-temperature
• Photoinduced renormalization of Dirac states in BaNiS${}_2$
• Terahertz control of surface topology probed with subatomic resolution
• Quantum Oscillations and Magnetoresistance in Type-II Weyl Semimetals - Effect of a Field Induced Charge Density Wave
• Tuning Dirac nodes with correlated d-electrons in BaCo_{1-x}Ni_{x}S_{2}
• Electron dynamics in a three-dimensional Brillouin zone analysed by machine learning
• Ultrafast carrier dynamics throughout the three-dimensional Brillouin zone of the Weyl semimetal PtBi${}_2$
• A combined laser-based ARPES and 2PPES study of Td-WTe${}_2$
• Interplay of electron-phonon nonadiabaticity and Raman scattering in the wavepacket dynamics of electron-phonon-photon systems
• Intrinsic ultrafast edge photocurrent dynamics in WTe${}_2$ driven by broken crystal symmetry
• Materials and possible mechanisms of extremely large magnetoresistance: A review