Inelastic light scattering from correlated electrons
By T. Devereaux, R. Hackl. 2006
477 citations recorded by the source corpus.
Inelastic light scattering is an intensively used tool in the study of electronic properties of solids. Triggered by the discovery of high-temperature superconductivity in the cuprates and by new developments in instrumentation, light scattering in both the visible (Raman effect) and x-ray part of the electromagnetic spectrum has become a method complementary to optical (infrared) spectroscopy while providing additional and relevant information. The main purpose of the review is to position Raman scattering with regard to single-particle methods like angle-resolved photoemission spectroscopy, and other transport and thermodynamic measurements in correlated materials. Particular focus will be placed on photon polarizations and the role of symmetry to elucidate the dynamics of electrons in different regions of the Brillouin zone. This advantage over conventional transport (usually measuring averaged properties) provides new insights into anisotropic and complex many-body behavior of electrons in various systems. Recent developments in the theory of electronic Raman scattering in correlated systems and experimental results in paradigmatic materials such as the A15 superconductors, magnetic and paramagnetic insulators, compounds with competing orders, as well as the cuprates with high superconducting transition temperatures are reviewed. An overview of the manifestations of complexity in the Raman response due to the impact of correlations and developing competing orders is presented. In a variety of materials, observations which may be understood and a summary of important open questions that pave the way to a detailed understanding of correlated electron systems, are discussed.
Subfields: Condensed Matter Physics, Electronic, Optical and Magnetic Materials
View Paper: https://www.semanticscholar.org/paper/7993fa6d95401f28e489c05936933ee286266bf4
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Citations in the corpus
- Progress and perspectives on electron-doped cuprates (2009, background): “…of low-energy excitations below the maximum gap value (down to zero energy in the case of lines of nodes for d-wave symmetry) implies that the Raman response follows very specific power law frequency dependencies for these various polarizations (Devereaux et al., 1994; Devereaux and Hackl, 2007).”
- Electrodynamics of correlated electron materials (2011, methodology): “Similar efforts were undertaken on the analysis of Raman spectra of cuprates (Devereaux and Hackl, 2007; Grilli et al., 2009).”
- Ultrafast optical spectroscopy of strongly correlated materials and high-temperature superconductors: a non-equilibrium approach (2016, background): “Here we have omitted the A2g symmetry term, because the pseudovector A2g symmetry components do not appear in low-energy spectra [330].”
- Two gaps make a high-temperature superconductor? (2007, background): “Here we would like to point out that studies of B2g and B1g Raman intensity [19, 40, 52], heat conductivity of nodal quasiparticles [70,71] and neutron magnetic resonance energy r [42] do show remarkable agreement with superconducting or pseudogap energy scales as inferred by single-particle”