Spectral dynamics of topological shift-current in ferroelectric semiconductor SbSI

Abstract

Photoexcitation in solids brings about transitions of electrons/holes between different electronic bands. If the solid lacks an inversion symmetry, these electronic transitions support spontaneous photocurrent due to the topological character of the constituting electronic bands; the Berry connection. This photocurrent, termed shift current, is expected to emerge on the time-scale of primary photoexcitation process. We observed ultrafast time evolution of the shift current in a prototypical ferroelectric semiconductor by detecting emitted terahertz electromagnetic waves. By sweeping the excitation photon energy across the band gap, ultrafast electron dynamics as a source of terahertz emission abruptly changes its nature, reflecting a contribution of Berry connection upon interband optical transition. The shift excitation carries a net charge flow, and is followed by a swing-over of the electron cloud on the sub-picosecond time-scale of electron-phonon interaction. Understanding these substantive characters of the shift current will pave the way for its application to ultrafast sensors and solar cells.

19 pages, 5 figures

References in corpus (12)

• First principles calculations of the Shift Current Bulk Photovoltaic Effect in Ferroelectrics
• Topological nature of nonlinear optical effects in solids
• Ferroelectric Materials for Solar Energy Conversion: Photoferroics Revisited
• Design principles for shift current photovoltaics
• Ultrafast photocurrents at the surface of the three-dimensional topological insulator ${\mathrm{Bi}}_2{\mathrm{Se}}_3$
• Spectral dynamics of topological shift-current in ferroelectric semiconductor SbSI
• Photogalvanic Effect in Weyl Semimetals from First Principles
• Topological aspects of nonlinear excitonic processes in noncentrosymmetric crystals
• Shift charge and spin photocurrents in Dirac surface states of topological insulator
• Current-voltage characteristic and shot noise of shift current photovoltaics
• Quantum kinetic theory of shift current electron pumping in semiconductors
• Terahertz radiation induced by coherent phonon generation via impulsive stimulated Raman scattering in paratellurite

Cited by in corpus (38)

• Magnetically Switchable Light-Matter Interaction in the Two-Dimensional Magnet CrI3
• Topology and geometry under the nonlinear electromagnetic spotlight
• Giant topological longitudinal circular photo-galvanic effect in the chiral multifold semimetal CoSi
• Chiral terahertz wave emission from the Weyl semimetal TaAs
• Spectral dynamics of topological shift-current in ferroelectric semiconductor SbSI
• Linear and nonlinear optical responses in the chiral multifold semimetal RhSi
• Giant linearly-polarized photogalvanic effect and second harmonic generation in two-dimensional axion insulators
• Tailoring Bulk Photovoltaic Effects in Magnetic Sliding Ferroelectric Materials
• Geometric aspects of nonlinear and nonequilibrium phenomena
• Strong bulk photovoltaic effect in chiral crystal in the visible spectrum
• Bulk Photovoltaic Effect Driven by Collective Excitations in a Correlated Insulator
• Quantized Integrated Shift Effect in Multigap Topological Phases
• Injection current in ferroelectric group-IV monochalcogenide monolayers
• Photovoltaic effect by soft phonon excitation
• First principles calculation of shift current in chalcopyrite semiconductor ZnSnP${}_2$
• Shift current from electromagnon excitations in multiferroics
• Electric polarization and nonlinear optical effects in noncentrosymmetric magnets
• Large shift current, $\pi$ Zak phase and unconventional nature in Se and Te
• Large shift current via in-gap and charge-neutral exciton excitations in BN nanotubes and single BN layer
• Antiferromagnetism-induced second-order nonlinear optical responses of centrosymmetric bilayer CrI${}_3$
• Theory of shift current in Anderson insulator
• Bulk photovoltaic effects in altermagnets
• Effects of relaxation on photovoltaic effect and possibility of photocurrent within transparent region
• Photocurrent-driven transient symmetry breaking in the Weyl semimetal TaAs
• Magnetic parity violation and parity-time-reversal-symmetric magnets
• Tunable bulk photovoltaic effect in strained $\gamma$-GeSe
• Correlation between electronic polarization and shift current in cubic and hexagonal semiconductors LiZn$X$ ($X$ = P, As, Sb)
• Bulk photovoltaic effect in antiferromagnet: Role of collective spin dynamics
• Photocurrent of exciton polaritons
• Nonlinear optical response in kagome lattice with inversion symmetry breaking
• Shift photocurrent vortices from topological polarization textures
• Theory of shift heat current and its application to electron-phonon coupled systems
• Terahertz radiation of jerk photocurrent
• Photovoltaic Effect from the Viewpoint of Time-reversal Symmetry
• Intrinsic ultrafast edge photocurrent dynamics in WTe${}_2$ driven by broken crystal symmetry
• Second-order magnetic responses in quantum magnets: Magnetization under ac magnetic fields
• Computing with bricks and mortar: Classification of waveforms with a doped concrete blocks
• Axion dark matter detection via shift current