Anomalous optical absorption in overdoped cuprates near the charge-ordering instability

Abstract

We propose an interpretation for the hump observed in the optical conductivity at or below a few hundreds of cm${}^{-1}$, in overdoped cuprates like the electron-doped Nd_{2-x}Ce_xCuO_{4-y} at x\gtrsim 0.15 and the hole-doped Bi_2Sr_2CuO_6 and La_{2-x}Sr_xCuO_4. This interpretation is based on the direct excitation of charge collective modes, which become nearly critical in the proximity to a charge-ordering instability. The nearly critical character of these excitations entails a peculiar temperature dependence and a pseudo-scaling form of the lineshapes, which are in agreement with the experimental data.

5 pages, 3 figures

References in corpus (2)

• Anomalous isotopic effect near the charge-ordering quantum criticality
• Singularities in the optical response of cuprates

Cited by in corpus (19)

• Inelastic Light Scattering From Correlated Electrons
• Infrared signatures of charge stripes in La(2-x)Sr(x)CuO(4)
• Dynamics of metallic stripes in cuprates
• Charge-fluctuation contribution to the Raman response in superconducting cuprates
• Strange metal behaviour from charge density fluctuations in cuprates
• Rise and Fall of Landau's Quasiparticles While Approaching the Mott Transition
• Mid-Infrared Conductivity from Mid-Gap States Associated with Charge Stripes
• Ward identity and optical-conductivity sum rule in the d-density wave state
• Quantum critical behavior of electrons at the edge of charge order
• Displaced Drude peak and bad metal from the interaction with slow fluctuations
• Signature of stripe pinning in optical conductivity
• Pseudogap metal induced by long-range Coulomb interactions
• Kinks and waterfalls as signatures of competing order in angle-resolved photoemission spectra of La_{2-x}Sr_xCuO_4
• Effects of Superconductivity and Charge Order on the sub-Terahertz reflectivity of La${}_{1.875}$Ba${}_{0.125-y}$Sr${}_y$CuO${}_4$
• Quantum-Acoustical Drude Peak Shift
• The Fredkin staircase: An integrable system with a finite-frequency Drude peak
• On the origin of the hump structure in the in-plane optical conductivity of high Tc cuprates based on a SU(2) slave-boson theory
• Spin and charge order in Mott insulators and d-wave superconductors
• Charge instabilities in strongly correlated bilayer systems