Effect of mesoscopic inhomogeneities on local tunnelling density of states

Abstract

We carry out a theoretical analysis of the momentum dependence of the Fourier-transformed local density of states (LDOS) in the superconducting cuprates within a model considering the interference of quasiparticles scattering on quenched impurities. The impurities introduce an external scattering potential, which is either nearly local in space or it can acquire a substantial momentum dependence due to a possible strong momentum dependence of the electronic screening near a charge modulation instability. The key new effect that we introduce is an additional mesoscopic disorder aiming to reproduce the inhomogeneities experimentally observed in scanning tunnelling microscopy. The crucial effect of this mesoscopic disorder is to give rise to point-like spectroscopic features, to be contrasted with the curve-like shape of the spectra previously calculated within the interfering-quasiparticle schemes. It is also found that stripe-like charge modulations play a relevant role to correctly reproduce all the spectral features of the experiments.

arXiv comment11 pages and 5 figures

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Cited by in corpus (14)

• Quasi-particle interference and superconducting gap in a high-temperature superconductor Ca2-xNaxCuO2Cl2
• Fourier transform spectroscopy of d-wave quasiparticles in the presence of atomic scale pairing disorder
• Interpretation of scanning tunneling quasiparticle interference and impurity states in cuprates
• Spectral signatures of modulated d-wave superconducting phases
• Universal signatures of Fermi arcs in quasiparticle interference on the surface of Weyl semimetals
• Visualization of atomic-scale phenomena in superconductors: application to FeSe
• Extinction of quasiparticle interference in underdoped cuprates with coexisting order
• On the checkerboard pattern and the autocorrelation of photoemission data in high temperature superconductors
• Local Density of States and Angle-Resolved Photoemission Spectral Function of an Inhomogeneous D-wave Superconductor
• Quasiparticle interference and the interplay between superconductivity and density wave order in the cuprates
• How orbitals and oxidation states determine apparent topographies in scanning tunneling microscopy: the case of fluorine on silver surfaces
• Coulomb Interaction-induced Checkerboard Patterns in Disordered Cuprates
• Identifying Collective Modes via Impurities in the Cuprate Superconductors
• Inhomogeneous D-Wave Superconductivity and Antiferromagnetism in a Two-Dimensional Extended Hubbard Model with Nearest-Neighbor Attractive Interaction