Surface photogalvanic effect in Weyl semimetals

Abstract

The photogalvanic effect -- a rectified current induced by light irradiation -- requires the intrinsic symmetry of the medium to be sufficiently low, which strongly limits candidate materials for this effect. In this work we explore how in Weyl semimetals the photogalvanic effect can be enabled and controlled by design of the material surface. Specifically, we provide a theory of ballistic linear and circular photogalvanic current in a Weyl semimetal spatially confined to a slab under general and variable surface boundary conditions. The results are applicable to Weyl semimetals with an arbitrary number of Weyl nodes at radiation frequencies small compared to the energy of non-linear terms in the dispersion at the Fermi level. The confinement-induced response is tightly linked to the configuration of Fermi-arc surface states, specifically the Fermi-arc connectivity and direction of emanation from the Weyl nodes, thus inheriting the same directionality and sensitivity to boundary conditions. As a result, the photogalvanic response of the system becomes much richer than that of an infinite system, and may be tuned via surface manipulations.

arXiv comment13 pages + 12 pages appendix, 8 Figures

References in corpus (45)

• Electronic Structure of Pyrochlore Iridates: From Topological Dirac Metal to Mott Insulator
• Weyl and Dirac Semimetals in Three Dimensional Solids
• Experimental discovery of Weyl semimetal TaAs
• Giant anomalous Hall effect in a ferromagnetic Kagome-lattice semimetal
• Discovery of a Weyl Fermion semimetal state in NbAs
• Quantized circular photogalvanic effect in Weyl semimetals
• Fermi-arc diversity on surface terminations of the magnetic Weyl semimetal Co3Sn2S2
• Charge Transport in Weyl Semimetals
• Anomalous Hall Effect in Weyl Metals
• Direct optical detection of Weyl fermion chirality in a topological semimetal
• Colossal Bulk Photovoltaic Effect in a Weyl Semimetal
• Transport evidence for Fermi-arc mediated chirality transfer in the Dirac semimetal Cd${}_3$As${}_2$
• Photocurrents in Weyl semimetals
• Semimetals for high performance photodetection
• Weyl Metals
• Optical characterization of topological insulator surface states: Berry curvature-dependent response
• Confinement-induced Berry phase and helicity-dependent photocurrents
• Low-frequency divergence and quantum geometry of the bulk photovoltaic effect in topological semimetals
• Observation of Topological Photocurrents in the Chiral Weyl Semimetal RhSi
• Magnetically Switchable Light-Matter Interaction in the Two-Dimensional Magnet CrI3
• Semiclassical theory of nonlinear magneto-optical responses with applications to topological Dirac/Weyl semimetals
• 3D quantum Hall effect of Fermi arcs in topological semimetals
• Chiral photocurrent in parity-violating magnet and enhanced response in topological antiferromagnet
• Consequences of Time-reversal-symmetry Breaking in the Light-Matter Interaction: Berry Curvature, Quantum Metric and Diabatic Motion
• Robust edge photocurrent response on layered Type II Weyl semimetal WTe2
• Photogalvanic Effect in Weyl Semimetals from First Principles
• Photogalvanic effect in Weyl semimetals
• Interactions remove the quantization of the chiral photocurrent at Weyl points
• Photocurrent Response of Topological Insulator Surface States
• Anomalous Hall Effect in type-I Weyl metals
• Shift charge and spin photocurrents in Dirac surface states of topological insulator
• Giant linearly-polarized photogalvanic effect and second harmonic generation in two-dimensional axion insulators
• Photovoltaic Chiral Magnetic Effect
• Towards Weyltronics: Realization of epitaxial NbP and TaP Weyl Semimetal thin films
• Quantized surface transport in topological Dirac semimetal films
• An Anomalous Circular Photogalvanic Effect in the Weyl Semimetal TaAs
• Manipulating Weyl quasiparticles by orbital-selective photoexcitation in WTe2
• Large contribution of Fermi arcs to the conductivity of topological metals
• Photocurrents in gyrotropic Weyl semimetals
• Twisted Fermi surface of a thin-film Weyl semimetal
• Spiraling Fermi arcs in Weyl materials
• Quantized Fermi-arc-mediated transport in Weyl semimetal nanowires
• Fermi arcs and DC transport in nanowires of Dirac and Weyl semimetals
• Anomalous conductance scaling in strained Weyl semimetals
• Parabolic Hall Effect due to Co-Propagating Surface Modes

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• Manipulating Photogalvanic Effects in Two-Dimensional Multiferroic Breathing Kagome Materials
• Nonlinear response functions and disorder: the case of photogalvanic effect