Linear and nonlinear optical responses in the chiral multifold semimetal RhSi

Abstract

Chiral topological semimetals are materials that break both inversion and mirror symmetries. They host interesting phenomena such as the quantized circular photogalvanic effect (CPGE) and the chiral magnetic effect. In this work, we report a comprehensive theoretical and experimental analysis of the linear and non-linear optical responses of the chiral topological semimetal RhSi, which is known to host multifold fermions. We show that the characteristic features of the optical conductivity, which display two distinct quasi-linear regimes above and below 0.4 eV, can be linked to excitations of different kinds of multifold fermions. The characteristic features of the CPGE, which displays a sign change at 0.4 eV and a large non-quantized response peak of around 160 $\mu {\text{A V}}^{-2}$ at 0.7 eV, are explained by assuming that the chemical potential crosses a flat hole band at the Brillouin zone center. Our theory predicts that, in order to observe a quantized CPGE in RhSi, it is necessary to increase the chemical potential as well as the quasiparticle lifetime. More broadly our methodology, especially the development of the broadband terahertz emission spectroscopy, could be widely applied to study photo-galvanic effects in noncentrosymmetric materials and in topological insulators in a contact-less way and accelerate the technological development of efficient infrared detectors based on topological semimetals.

arXiv commentAccepted in npj Quantum Materials; Abstract updated

References in corpus (62)

• Electronic Structure of Pyrochlore Iridates: From Topological Dirac Metal to Mott Insulator
• Weyl and Dirac Semimetals in Three Dimensional Solids
• Discovery of a Weyl Fermion Semimetal and Topological Fermi Arcs
• Type-II Weyl Semimetals
• Discovery of a Three-dimensional Topological Dirac Semimetal, Na3Bi
• Weyl Semimetal in a Topological Insulator Multilayer
• Dirac semimetal and topological phase transitions in A3Bi (A=Na, K, Rb)
• Three Dimensional Dirac Semimetal and Quantum Transports in Cd3As2
• Theoretical Discovery/Prediction: Weyl Semimetal states in the TaAs material (TaAs, NbAs, NbP, TaP) class
• Observation of a topological 3D Dirac semimetal phase in high-mobility Cd3As2
• Beyond Dirac and Weyl fermions: Unconventional quasiparticles in conventional crystals
• Phase transition between the quantum spin Hall and insulator phases in 3D: emergence of a topological gapless phase
• Observation of Weyl nodes in TaAs
• Discovery of a Weyl Fermion semimetal state in NbAs
• Experimental observation of topological Fermi arcs in type-II Weyl semimetal MoTe2
• Quantized circular photogalvanic effect in Weyl semimetals
• Antiferromagnetic opto-spintronics: Part of a collection of reviews on antiferromagnetic spintronics
• Spectroscopic evidence for type II Weyl semimetal state in MoTe2
• Giant anisotropic nonlinear optical response in transition metal monopnictide Weyl semimetals
• Observation of the Type-II Weyl Semimetal Phase in MoTe2
• Topological quantum properties of chiral crystals
• Multiple types of topological fermions in transition metal silicides
• MoTe2: A Type-II Weyl Topological Metal
• Direct optical detection of Weyl fermion chirality in a topological semimetal
• Spectral and Fermi surface properties from Wannier interpolation
• Colossal Bulk Photovoltaic Effect in a Weyl Semimetal
• Large Fermi Arcs in Unconventional Weyl Semimetal RhSi
• A new type of Weyl semimetal with quadratic double Weyl fermions in SrSi2
• Discovery of topological chiral crystals with helicoid arc states
• New classes of chiral topological nodes with non-contractible surface Fermi arcs in CoSi
• Double Dirac Semimetals in Three Dimensions
• Berry Curvature Enhanced Nonlinear Photogalvanic Response of Type-II Weyl Cone
• Observation of Weyl nodes and Fermi arcs in TaP
• Observation of Chiral Fermions with a Large Topological Charge and and Associated Fermi-Arc Surface States in CoSi
• Large bulk photovoltaic effect and spontaneous polarization of single-layer monochalcogenides
• Arc-tunable Weyl Fermion metallic state in Mo${}_x$W${}_{1-x}$Te${}_2$
• Optical characterization of topological insulator surface states: Berry curvature-dependent response
• Observation of Topological Photocurrents in the Chiral Weyl Semimetal RhSi
• Chiral Optical Response of Multifold Fermions
• Existence of bulk chiral fermions and crystal symmetry
• Discovery of a new type of topological Weyl fermion semimetal state in Mo${}_x$W${}_{1-x}$Te${}_2$
• Chiral terahertz wave emission from the Weyl semimetal TaAs
• Spatially dispersive circular photogalvanic effect in a Weyl semimetal
• Spectral dynamics of topological shift-current in ferroelectric semiconductor SbSI
• Universal Decomposition of the Low-Frequency Conductivity Spectra of Iron-Pnictides Uncovering Fermi-Liquid Behavior
• Robust edge photocurrent response on layered Type II Weyl semimetal WTe2
• Resonance-enhanced optical nonlinearity in the Weyl semimetal TaAs
• Photogalvanic Effect in Weyl Semimetals from First Principles
• Tracking ultrafast photocurrents in the Weyl semimetal TaAs using THz emission spectroscopy
• Photogalvanic effect in Weyl semimetals
• Difference frequency generation in topological semimetals
• Shift current bulk photovoltaic effect influenced by quasiparticles and excitons
• Hidden $T$-Linear Scattering Rate in Ba${}_{0.6}$K${}_{0.4}$Fe${}_2$As${}_2$ Revealed by Optical Spectroscopy
• Optical signatures of multifold fermions in the chiral topological semimetal CoSi
• Linear optical conductivity of chiral multifold fermions
• An Anomalous Circular Photogalvanic Effect in the Weyl Semimetal TaAs
• An ab-initio study of circular photogalvanic effect in chiral multifold semimetals
• Strong bulk photovoltaic effect in chiral crystal in the visible spectrum
• Optical conductivity of multifold fermions: the case of RhSi
• Temperature-induced inversion of the spin-photogalvanic effect in WTe${}_2$ and MoTe${}_2$
• Divergent bulk photovoltaic effect in Weyl semimetals
• Band-selective clean- and dirty-limit superconductivity with nodeless gaps in the bilayer iron-based superconductor CsCa${}_2$Fe${}_4$As${}_4$F${}_2$

Cited by in corpus (47)

• Topology and geometry under the nonlinear electromagnetic spotlight
• Giant topological longitudinal circular photo-galvanic effect in the chiral multifold semimetal CoSi
• Origin of the Charge Density Wave in the Kagome Metal CsV${}_3$Sb${}_5$ as Revealed by Optical Spectroscopy
• Optical signatures of multifold fermions in the chiral topological semimetal CoSi
• Kramers Nodal Line Metals
• Giant intrinsic anomalous terahertz Faraday rotation in the magnetic Weyl semimetal Co${}_2$MnGa at room temperature
• Electronic structure and unconventional non-linear response in double Weyl semimetal SrSi${}_2$
• Two-dimensional Weyl points and nodal lines in pentagonal materials and their optical response
• Topology and symmetry of circular photogalvanic effect in the chiral multifold semimetals: a review
• Nonlinear photoconductivities and quantum geometry of chiral multifold fermions
• Abnormal Surface Nonlinear Optical Responses in Topological Materials
• Colossal magnetoresistance in Ti lightly-doped Cr2Se3 single crystals with layered structure
• Distinct signatures of particle-hole symmetry breaking in transport coefficients for generic multi-Weyl semimetals
• Observation of terahertz second harmonic generation from Dirac surface states in the topological insulator Bi${}_2$Se${}_3$
• Visualizing higher-fold topology in chiral crystals
• Optoelectronic Fingerprints of Interference between Different Charge Carriers in Graphene Superlattices and Analogies to Twisted Graphene Bilayers
• Cubic Hall viscosity in three-dimensional topological semimetals
• Broadband optical conductivity of the chiral multifold semimetal PdGa
• Photogalvanic response in multi-Weyl semimetals
• Topological diffusive metal in amorphous transition metal monosilicides
• Trompe L'oeil Ferromagnetism: magnetic point group analysis
• Analysis of the unconventional chiral fermions in a non-centrosymmetric chiral crystal $\text{PtAl}$
• Detection of quantum geometric tensor by nonlinear optical response
• Floquet Engineering of Multifold Fermions
• Multiplicative topological semimetals
• Absence of quantization in the circular photogalvanic effect in disordered chiral Weyl semimetals
• Topological multiband s-wave superconductivity in coupled multifold fermions
• Nonlinear charge and thermal transport properties induced by orbital magnetic moment in chiral crystal cobalt monosilicide
• Quantum transport of a spin-1 chiral fermion
• Kramers-Weyl fermions in the chiral charge density wave material (TaSe${}_4$)${}_2$I
• Conservation of chirality at a junction between two Weyl semimetals
• Electrical conductivity and screening effect of spin-1 chiral fermions scattered by charged impurities
• Band Curvature Effects on Quantum Transport of Spin-1 Chiral Fermion Systems
• Spin-orbit interactions may relax the rigid conditions leading to flat bands
• Infrared spectroscopy study of kagome material CsTi${}_3$Bi${}_5$
• From quantum geometry to non-linear optics and gerbes: Recent advances in topological band theory
• Theory of Photocurrent and High-Harmonic Generation with Chiral Fermions
• Large circular photogalvanic effect in the noncentrosymmetric magnetic Weyl semimetal CeAlSi
• Symmetry-adapted models for multifold fermions with spin-orbit coupling
• Orbital magnetization as the origin of the nonlinear Hall effect
• Magnetic Photocurrents in Multifold Weyl Fermions
• Direct Measurement of Helicoid Surface States in RhSi using Nonlinear Optics
• Quantum Transport in Spin-1 Chiral Fermion: Self-Consistent Born Approximation
• Ultrafast Carrier Relaxation and Second Harmonic Generation in a Higher-Fold Weyl Fermionic System PtAl
• Fermi surface and topology of multiband superconductor BeAu
• Suppression of second-harmonic generation from linear bands in the topological multifold semimetal RhSi
• Nonlinear response functions and disorder: the case of photogalvanic effect