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RESEARCH PRODUCT
Incoherent midinfrared charge excitation and the high-energy anomaly in the photoemission spectra of cuprates
Roberta CitroMaria MarinaroS. Cojocarusubject
PhysicsCondensed Matter - Materials ScienceCondensed matter physicsInverse photoemission spectroscopyMaterials Science (cond-mat.mtrl-sci)FOS: Physical sciencesAngle-resolved photoemission spectroscopyCondensed Matter PhysicsOptical conductivityhigh-temperature superconductorsSpectral lineElectronic Optical and Magnetic MaterialsLaser linewidthCuprateAnomaly (physics)Excitationdescription
On the basis of a semi-phenomenological model, it is argued that the high energy anomaly observed in recent photoemission experiments on cuprates is caused by interaction with an overdamped bosonic mode in the mid-infrared region of the spectrum. Analysis of optical conductivity allows to connect this excitation to the incoherent charge response reported for the majority of high Tc materials and some other perovskites. We show that its large damping is an essential feature responsible for the "waterfall" dispersion and linewidth of the spectral weight.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2007-01-01 |