Nonmonotonic gap in the coexisting antiferromagnetic and superconducting states of electron-doped cuprate superconductors
Qingshan Yuan, Feng Yuan, C. S. Ting
DOI 10.1103/PhysRevB.73.054501 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We argue that the experimentally observed nonmonotonic gap in electron-doped cuprates at optimal doping is the lowest quasiparticle excitation energy in the coexisting antiferromagnetic (AF) and superconducting (SC) state. The idea is implemented by studying the coexistence of AF and SC orders with the t−t′−t″−J model. Although the pairing gap itself is assumed to be the simplest d wave which is monotonic, we have found that the quasiparticle excitation gap in the coexisting state is nonmonotonic, with the maxima around the hot spots where the Fermi surface is missing due to the AF gap. Within the same framework of the coexisting state the spectral function is also calculated at optimal doping. The obtained results are all qualitatively consistent with experiments.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nd2-xCexCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Pr1-xLaCexCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Anomalous dissipation in the mixed state of underdoped cuprates close to the superconductor-insulator boundary
similarity 0.97C. Capan et al.
Source status unknown — claims are unverified
Emergence of charge order in a staggered loop-current phase of cuprate high-temperature superconductors
similarity 0.97W. A. Atkinson et al.
Source status unknown — claims are unverified
Theory of antiferromagnetism in the electron-doped cuprate superconductors
similarity 0.97Xin-Zhong Yan et al.
Source status unknown — claims are unverified
Transport evidence of a magnetic quantum phase transition in electron-doped high-temperature superconductors
similarity 0.96W. Yu et al.
Source status unknown — claims are unverified
Fermi-surface evolution and pseudogap symmetry in n-type cuprate superconductors
similarity 0.96Y. Zhou et al.
Source status unknown — claims are unverified
Nearest-neighbor repulsion in electron-doped high-temperature cuprate superconductors
similarity 0.96A. J. Fedro & H.-B. Schüttler
Source status unknown — claims are unverified