Electrodynamics of Correlated Electron Materials

Abstract

We review studies of the electromagnetic response of various classes of correlated electron materials including transition metal oxides, organic and molecular conductors, intermetallic compounds with $d$- and $f$-electrons as well as magnetic semiconductors. Optical inquiry into correlations in all these diverse systems is enabled by experimental access to the fundamental characteristics of an ensemble of electrons including their self-energy and kinetic energy. Steady-state spectroscopy carried out over a broad range of frequencies from microwaves to UV light and fast optics time-resolved techniques provide complimentary prospectives on correlations. Because the theoretical understanding of strong correlations is still evolving, the review is focused on the analysis of the universal trends that are emerging out of a large body of experimental data augmented where possible with insights from numerical studies.

78 pages, 55 figures, 984 references

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• Filling-Factor-Dependent Magnetophonon Resonance in Graphene
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• Optical Properties of III-Mn-V Ferromagnetic Semiconductors
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• Effects of the magnetic orderings on the dynamical conductivity: optical investigations of EuFe${}_2$As${}_2$ single crystals
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• Electromagnons in multiferroic RMn2O5 compounds and their microscopic origin
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• Theory of optical spectral weights in Mott insulators with orbital degrees of freedom
• Ellipsometric study of the Electronic Structure of GaMnAs and LT-GaAs
• Scaling of the superfluid density in high-temperature superconductors
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• Theory of time-resolved optical spectroscopy on correlated electron systems
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• Observation of charge-density-wave excitations in manganites
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• Symmetry of the superconducting order parameter in frustrated systems determined by the spatial anisotropy of spin correlations
• Imaging phase separation near the Mott boundary in the correlated organic superconductors $\kappa$-(BEDT-TTF)${}_2$X
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• Charge order, metallic behavior and superconductivity in La_{2-x}Ba_xCuO_4 with x=1/8
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• High temperature superconductivity: from complexity to simplicity
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• Detection of coherent magnons via ultrafast pump-probe reflectance spectroscopy in multiferroic Ba0.6Sr1.4Zn2Fe12O22
• Materials Design using Correlated Oxides: Optical Properties of Vanadium Dioxide
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• Signature of Electronic Correlations in the Optical Conductivity of the Doped Semiconductor Si:P
• Electric-dipole active two-magnon excitation in {\textit{ab}} spiral spin phase of a ferroelectric magnet Gd${}_{\text{0.7}}$Tb${}_{\text{0.3}}$MnO${}_{\text{3}}$
• Quantum critical transition from charge-ordered to superconducting state in the triangular lattice negative-U extended Hubbard model
• Heavy-fermion metals with hybridization nodes: Unconventional Fermi liquids and competing phases
• Polaronic features in the optical properties of the Holstein-t-J model
• Doping dependent optical properties of Bi2201
• Optical Integral in the Cuprates and the Question of Sum Rule Violation
• Microwave conductivity of heavy fermions in UPd2Al3
• Optical-conductivity sum rule in cuprates and unconventional charge density waves: a short review
• Spin and Charge Fluctuations and Lattice Effects on Charge Orders in α-(BEDT-TTF)_2I_3
• Dynamics of spin and orbital phase transitions in YVO3
• Optical conductivity near finite-wavelength quantum criticality
• Half-filled Hubbard Model on a Bethe lattice with next-nearest neighbor hopping
• Correlation of optical conductivity and ARPES spectra of strong-coupling large polarons and its display in cuprates
• Influence of electronic correlations on the frequency-dependent hopping transport in Si:P
• Heavy fermion fluid in high magnetic fields: an infrared study of CeRu${}_4$Sb${}_{12}$
• Effective masses in a strongly anisotropic Fermi liquid
• Compensation driven superconductor-insulator transition
• Temperature Dependence of the Conductivity Sum Rule in the Normal State due to Inelastic Scattering
• Iron-Based Heavy Quasiparticles in SrFe${}_4$Sb${}_{12}$: An Infrared Spectroscopic Study
• Analysis of broadband microwave conductivity and permittivity measurements of semiconducting materials
• Bound Excitons in Sr${}_2$CuO${}_3$
• Optical conductivity in non-equilibrium d-wave superconductors
• Magnetic Field-Induced Superconductor-Insulator-Metal Transition in an Organic Conductor: An Infrared Magneto-Optical Imaging Spectroscopy
• Optics clues to pairing glues in high T${}_c$ cuprates
• Magneto-optic far-infrared study of Sr${}_{14}$Cu${}_{24}$O${}_{41}$: triplet excitations in chains
• Comment on ``Collapse of Coherent Quasiparticle States in $\theta$-(BEDT-TTF)${}_2$I${}_3$ Observed by Optical Spectroscopy''
• Low-Energy Electrodynamics of Heavy Quasiparticles in ZrZn2
• Optical Sum Rule in Strongly Correlated Systems

Cited by in corpus (2)

• Extended Drude model and role of interband transitions in the mid-infrared spectra of pnictides
• Phonon splitting and anomalous enhancement of infrared-active modes in BaFe${}_2$As${}_2$