@inproceedings{a51815b72a7b4043984dc7234ea774f8,
title = "Strong off-diagonal polarizability and electron-lattice coupling in high-temperature superconductors",
abstract = "High-temperature superconducting (HTS) cuprates are highly anisotropic materials which exhibit metallic-like behavior in the CuO2 planes while retaining dielectric properties in the perpendicular, c-axis, direction. Experimental data show however that in HTS systems the in-plane electronic excitations are strongly coupled to c-axis polarized vibrations. This interaction is manifest in various settings, for example in the resonant Raman profile of phononic excitations, inelastic quasi-particle tunneling, as observation of notch-like features and forbidden scattering for in-plane optical conductivity, colossal c-axis photo-expansion upon in-plane illumination as well as in high-resolution electron energy-loss spectra. We propose that this anisotropic coupling is driven by strong unscreened Coulomb interactions and the preponderance of the Madelung component to the cohesion energy, in particular by the large atomic displacements in the spacer layers induced by charge redistribution within the CuO2 planes.",
keywords = "Correlated electronic systems, Electron energy loss, Electron-phonon coupling, High-temperature superconductivity, Madelung energy, Optical properties, Raman scattering, Screening, X-ray diffraction",
author = "A. Gozar and P. Abbamonte and I. Bozovic",
note = "This research was supported as part of the Center for Emergent Superconductivity, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Basic Energy Sciences. A.G. is supported by the Gordon and Betty Moore Foundation's EPiQS Initiative through Grant GBMF4410.; Oxide-Based Materials and Devices VIII 2017 ; Conference date: 29-01-2017 Through 01-02-2017",
year = "2017",
doi = "10.1117/12.2266052",
language = "English (US)",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Teherani, \{Ferechteh H.\} and Look, \{David C.\} and Rogers, \{David J.\} and Ivan Bozovic",
booktitle = "Oxide-Based Materials and Devices VIII 2017",
}