Competing orders and the doping and momentum dependent quasiparticle excitations in cuprate superconductors

Abstract

The low-energy quasiparticle excitations in hole- and electron-type cuprate superconductors are investigated via both experimental and theoretical means. It is found that the doping and momentum dependence of the empirical low-energy quasiparticle excitations is consistent with a scenario of coexisting competing orders and superconductivity in the ground state of the cuprates. This finding, based on zero-field quasiparticle spectra, is further corrobarated by the patially resolved vortex-state scanning tunneling spectroscopy, which reveals pseudogap-like features consistent with a remaining competing order inside the vortex core upon the suppression of superconductivity. The competing orders compatible with empirical observations include the charge-density wave and spin-density wave. In contrast, spectral characteristics derived from incorporating the $d$-density wave as a competing order appear unfavorable in comparison with experiments.

16 pages, 5 figures. To appear in Physica C. Corresponding Author: Nai-Chang Yeh ([email protected])

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• Direct Role of Structural Dynamics in Electron-Lattice Coupling of Superconducting Cuprates
• Observation of vortices and hidden pseudogap from scanning tunneling spectroscopic studies of electron-doped cuprate superconductor $S{r}_{0.9}L{a}_{0.1}Cu{O}_2$
• Scanning tunneling spectroscopic evidence for magnetic field-induced microscopic orders in the high-$T_c$ superconductor YBa${}_2$Cu${}_3$O${}_{7-\delta }$
• Theory of (001) surface and bulk states in Y${}_{1-y}$Ca${}_y$Ba${}_2$Cu${}_3$O${}_{7-\delta }$}
• Unconventional Low-Energy Excitations of Cuprate Superconductors
• Possible Competing Order-Induced Fermi Arcs in Cuprate Superconductors
• Spectroscopic Evidence for Competing Order-Induced Pseudogap Phenomena and Unconventional Low-Energy Excitations in High-TC Cuprate Superconductors
• Electromagnetic response of high-Tc superconductors -- the slave-boson and doped-carrier theories
• Superconducting Dome from Holography
• Comparative studies of the scanning tunneling spectra in cuprate and iron-arsenide superconductors