Anisotropic scattering caused by apical oxygen vacancies in thin films of overdoped high-temperature cuprate superconductors

Abstract

There is a hot debate on the anomalous behavior of superfluid density ${\rho }_s$ in overdoped La${}_{2-x}$Sr${}_x$CuO${}_4$ films in recent years. The linear drop of ${\rho }_s$ at low temperatures implies the superconductors are clean, but the linear scaling between ${\rho }_s$ (in the zero temperature limit) and the transition temperature $T_c$ is a hallmark of the dirty limit in the Bardeen-Cooper-Schrieffer (BCS) framework [I. Bozovic et al., Nature 536, 309 (2016)]. This dichotomy motivated exotic theories beyond the standard BCS theory. We show, however, that such a dichotomy can be reconciled naturally by the role of increasing anisotropic scattering caused by the apical oxygen vacancies. Furthermore, the anisotropic scattering also explains the "missing" Drude weight upon doping in the optical conductivity, as reported in the THz experiment [F. Mahmood et al., Phys. Rev. Lett. 122, 027003 (2019)]. Therefore, the overdoped cuprates can actually be described consistently by the $d$-wave BCS theory with the unique anisotropic scattering.

12 pages, 10 figures, supplementary materials included

References in corpus (2)

• Band Structure of Overdoped Cuprate Superconductors: Density Functional Theory Matching Experiments
• Thermodynamic properties of the Dynes superconductors

Cited by in corpus (12)

• Strongly-overdoped La${}_{2-x}$Sr${}_x$CuO${}_4$: Evidence for Josephson-coupled grains of strongly-correlated superconductor
• Evolution of plasmon excitations across the phase diagram of the cuprate superconductor La${}_{2-x}$Sr${}_x$CuO${}_4$
• Effect of realistic out-of-plane dopant potentials on the superfluid density of overdoped cuprates
• Emergent normal fluid in the superconducting ground state of overdoped cuprates
• Superconducting fluctuations and charge-4$e$ plaquette state at strong coupling
• Paramagnetic contribution in superconductors with different-mass Cooper pairs
• Comment on "Anisotropic Scattering Caused by Apical Oxygen Vacancies in Thin Films of Overdoped High-Temperature Cuprate Superconductors"
• Intrinsic phase fluctuation and superfluid density in doped Mott insulators
• Optical conductivity of overdoped cuprates from ab-initio out-of-plane impurity potentials
• Effect of anisotropic impurity scattering in d-wave superconductors
• The magnetic field driven superconductor-metal transition in disordered hole-overdoped cuprates
• Magnetotransport in overdoped La${}_{2-x}$Sr${}_x$CuO${}_4$: Effect of anisotropic scattering