Nonmonotonic gap in the coexisting antiferromagnetic and superconducting state for electron-doped cuprate superconductors

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 consistent with experiments.

5 pages, 4 figures

References in corpus (18)

• Doping dependence of an n-type cuprate superconductor investigated by ARPES
• Phase-sensitive Evidence for d-wave Pairing Symmetry in Electron-doped Cuprate Superconductors
• Evidence of a d to s-wave pairing symmetry transition in the electron-doped cuprate superconductor Pr${}_{2-x}$Ce${}_x$CuO${}_4$
• Superconducting Gap Anisotropy in Nd${}_{1.85}$Ce${}_{0.15}$CuO${}_4$: Results from Photoemission
• Direct Observation of Non-Monotonic dx2-y2-Wave Superconducting Gap in Electron-Doped High-Tc Superconductor Pr0.89LaCe0.11CuO4
• Nonmonotonic d_{x^2-y^2} Superconducting Order Parameter in Nd_{2-x}Ce_xCuO_4
• Evidence for a Transition in the Pairing Symmetry of the Electron-Doped Cuprates La_{2-x}Ce_xCuO_{4-y} and Pr_{2-x}Ce_xCuO_{4-y}
• Anomalous Low Temperature Behavior of Superconducting Nd(1.85)Ce(0.15)CuO(4-y)
• Magnetic and superconducting phase diagram of electron-doped Pr${}_{1-x}$LaCe${}_x$CuO${}_4$
• Spin Correlations and Magnetic Order in Nonsuperconducting Nd_{2-x}Ce_xCuO_{4\pmδ}
• Superfluid response in electron-doped cuprate superconductors
• Phase-sensitive order parameter symmetry test experiments utilizing Nd2-xCexCuO4-y/Nb zigzag junctions
• Distinct Pairing Symmetries in $N{d}_{1.85}C{e}_{0.15}Cu{O}_{4-y}$ and $L{a}_{1.89}S{r}_{0.11}Cu{O}_4$ Single Crystals: Evidence from Comparative Tunnelling Measurements
• Fermi surface evolution in the antiferromagnetic state for the electron-doped t-t'-t''-J model
• Doping dependence of the electron-doped cuprate superconductors from the antiferromagnetic properties of the Hubbard model
• Hot Spots and Transition from d-Wave to Another Pairing Symmetry in the Electron-Doped Cuprate Superconductors
• Spin dynamics in the antiferromagnetic phase for electron-doped cuprate superconductors
• Nonmonotonic d_{x^2-y^2}-Wave Superconductivity in Electron-Doped Cuprates Viewing from the Strong-Coupling Side

Cited by in corpus (14)

• Progress and perspectives on the electron-doped cuprates
• Nonmonotonic $d_{x^2-y^2}$ superconducting gap in electron-doped Pr${}_{0.89}$LaCe${}_{0.11}$CuO${}_4$: Evidence of coexisting antiferromagnetism and superconductivity?
• s-Wave-Like excitation in the superconducting state of electron-doped cuprates with d-wave pairing
• Two-Fermi-surface superconducting state and a nodal d-wave gap in the electron-doped Sm(1.85)Ce(0.15)CuO(4-d) cuprate superconductor
• Bogoliubov Quasiparticle on the Gossamer Fermi Surface in Electron-Doped Cuprates
• $d$-wave superconducting gap observed in protect-annealed electron-doped cuprate superconductors Pr${}_{1.3-x}$La${}_{0.7}$Ce${}_x$CuO${}_4$
• Superconducting phase diagram of itinerant antiferromagnets
• Gap function symmetry and spin dynamics in electron-doped cuprate superconductor
• Theory of point contact spectroscopy in electron-doped cuprates
• Spin-resolved impurity resonance states in electron-doped cuprate superconductors
• Energy Scales in the Raman spectrum of electrons and hole doped cuprates within competing scenarios
• Impurity resonance states in electron-doped high T_c superconductors
• The commensurate magnetic excitations induced by band-splitting and Fermi surface topology in n-type Cuprates
• Coexistence of the antiferromagnetic and superconducting order and its effect on spin dynamics in electron-doped high-$T_c$ cuprates