Photocurrents in Weyl semimetals

Abstract

The generation of photocurrent in an ideal two-dimensional Dirac spectrum is symmetry-forbidden. In sharp contrast, we show that three-dimensional Weyl semimetals can generically support significant photocurrent generations due to the combination of inversion symmetry breaking and finite tilts of the Weyl spectra. Symmetry properties, chirality relations and various dependences on the system and light sources are explored in details. Our results suggest that noncentrosymmetric Weyl materials can be advantageously applied to room temperature detections of mid- and far-infrared radiations.

6 pages, 4 figures

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• Photogalvanic Effect in Weyl Semimetals from First Principles
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• Twisted photovoltaics at terahertz frequencies from momentum shift current
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• Manipulating Weyl quasiparticles by orbital-selective photoexcitation in WTe2
• An ab-initio study of circular photogalvanic effect in chiral multifold semimetals
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• Terahertz Photogalvanic Spectroscopy of Three Dimensional Topological Insulators
• Circular dichroism as a probe for topology in three-dimensional semimetals
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• Kramers Weyl Semimetals as Quantum Solenoids and Their Applications in Spin-Orbit Torque Devices
• Experimental Progress on Layered Topological Semimetals
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• Rabi Regime of Current Rectification in Solids
• The Berry dipole photovoltaic demon and the thermodynamics of photo-current generation within the optical gap of metals
• Nonperturbative Topological Current in Weyl and Dirac Semimetals in Laser Fields
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• Nonlinear optical responses in multi-orbital topological superconductors
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• Manipulating Photogalvanic Effects in Two-Dimensional Multiferroic Breathing Kagome Materials
• Controllable photocurrent generation in Dirac systems with two frequency drives
• Topological Insulator Metamaterial with Giant Circular Photogalvanic Effect
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• Tunable chiral symmetry breaking in symmetric Weyl materials
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• Experimental study of transport properties of Weyl semimetal LaAlGe thin films grown by molecular beam epitaxy
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