Electronic Structure of Electron-doped Sm1.86Ce0.14CuO4: Strong `Pseudo-Gap' Effects, Nodeless Gap and Signatures of Short Range Order

Abstract

Angle resolved photoemission (ARPES) data from the electron doped cuprate superconductor Sm${}_{1.86}$Ce${}_{0.14}$CuO${}_4$ shows a much stronger pseudo-gap or "hot-spot" effect than that observed in other optimally doped $n$-type cuprates. Importantly, these effects are strong enough to drive the zone-diagonal states below the chemical potential, implying that d-wave superconductivity in this compound would be of a novel "nodeless" gap variety. The gross features of the Fermi surface topology and low energy electronic structure are found to be well described by reconstruction of bands by a $\sqrt{2}\times \sqrt{2}$ order. Comparison of the ARPES and optical data from the $same$ sample shows that the pseudo-gap energy observed in optical data is consistent with the inter-band transition energy of the model, allowing us to have a unified picture of pseudo-gap effects. However, the high energy electronic structure is found to be inconsistent with such a scenario. We show that a number of these model inconsistencies can be resolved by considering a short range ordering or inhomogeneous state.

5 pages, 4 figures

References in corpus (16)

• A `checkerboard' electronic crystal state in lightly hole-doped Ca_{2-x}Na_{x}CuO_{2}Cl_{2}
• Doping dependence of an n-type cuprate superconductor investigated by ARPES
• Phase-sensitive Evidence for d-wave Pairing Symmetry in Electron-doped Cuprate Superconductors
• Hot Spots and Pseudogaps for Hole- and Electron-Doped High-Temperature Superconductors
• Evidence for a quantum phase transition in the electron-doped cuprate Pr2-xCexCuO4+d from Hall and resistivity measurements
• Anomalous electronic structure and pseudogap effects in Nd_1.85Ce_0.15CuO_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
• Commensurate spin dynamics in the superconducting state of an electron-doped cuprate superconductor
• Angle-Resolved Photoemission Spectroscopy of the Antiferromagnetic Superconductor Nd1.87Ce0.13CuO4: Anisotropic Spin-Correlation Gap, Pseudogap, and the Induced Quasiparticle Mass Enhancement
• Asymmetry of the electronic states in hole- and electron-doped cuprates: Exact diagonalization study of the t-t'-t''-J model
• Theory of Low-Temperature Hall Effect in Electron-Doped Cuprates
• Infrared Properties of Electron Doped Cuprates: Tracking Normal State Gaps and Quantum Critical Behavior in Pr(2-x)Ce(x)CuO(4)
• Magnetic Penetration Depth Measurements of Pr${}_{2-x}$Ce${}_x$CuO${}_{4-\delta }$ Films on Buffered Substrates: Evidence for a Nodeless Gap
• An angle-resolved photoemission spectral function analysis of the electron doped cuprate Nd_1.85Ce_0.15CuO_4
• Absence of magnetic field effect on static magnetic order in electron-doped superconductor Nd_{1.86}Ce_{0.14}CuO_4

Cited by in corpus (36)

• Progress and perspectives on the electron-doped cuprates
• Pseudogap from ARPES experiment: three gaps in cuprates and topological superconductivity
• Magnetic-field-enhanced incommensurate magnetic order in the underdoped high-temperature superconductor YBa(2)Cu(3)O(6.45)
• Suppression of the antiferromagnetic pseudogap in the electron-doped high-temperature superconductor by "protect annealing"
• Effective theory of Fermi pockets in fluctuating antiferromagnets
• Coexistence of Antiferromagnetism and Superconductivity in Electron-doped High-Tc Superconductors
• Electronic structure near the 1/8-anomaly in La-based cuprates
• Fermi surface reconstruction in electron-doped cuprates without antiferromagnetic long-range order
• Nodeless superconductivity arising from strong (pi,pi) antiferromagnetism in the infinite-layer electron-doped cuprate Sr1-xLaxCuO2
• Destruction of Neel order in the cuprates by electron-doping
• Temperature and doping dependence of high-energy kink in cuprates
• Correlation between Fermi surface transformations and superconductivity in the electron-doped high-$T_c$ superconductor Nd${}_{2-x}$Ce${}_x$CuO${}_4$
• Angle-resolved photoemission spectroscopy of electron-doped cuprate superconductors: Isotropic electron-phonon coupling
• Paired electron pockets in the hole-doped cuprates
• 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
• Electronic band structure of optimal superconductors: from cuprates to ferropnictides and back again
• Angle-resolved photoemission spectroscopy of the low-energy electronic structure of superconducting Pr${}_2$CuO${}_4$ driven by oxygen non-stoichiometry
• Bogoliubov Quasiparticle on the Gossamer Fermi Surface in Electron-Doped Cuprates
• Local tunneling spectroscopy of the electron-doped cuprate Sm1.85Ce0.15CuO4
• Pseudogap in a crystalline insulator doped by disordered metals
• Evidence for Fermi surface reconstruction in the static stripe phase of La${}_{1.8-x}$Eu${}_{0.2}$Sr${}_x$CuO${}_4$, $x=1/8$
• Analysis of the spectral function of Nd1.85Ce0.15CuO4, obtained by angle resolved photoemission spectroscopy
• Pseudogap in electron-doped cuprates: Strong correlation leading to band splitting
• Anisotropic dressing of electrons in electron-doped cuprate superconductors
• Superconducting Dome in ${\mathrm{La}}_{3-x}{\mathrm{Sr}}_x{\mathrm{Ni}}_2{\mathrm{O}}_{7-\delta }$ Thin Films
• Terahertz magneto-transport measurements in underdoped PCCO and comparison with ARPES
• Energy Scales in the Raman spectrum of electrons and hole doped cuprates within competing scenarios
• Behaviour of superconductivity energetic characteristics in electron-doped cuprates. A simple model
• Impurity resonance states in electron-doped high T_c superconductors
• Terahertz Hall Measurements On Optimally Doped Single Crystal Bi-2212
• The Fermi surface and the role of electronic correlations in Sm${}_{2-x}$Ce${}_x$CuO${}_4$
• Topological phase transition from nodal to nodeless d-wave superconductivity in electron-doped cuprate superconductors
• Vanishing pseudogap around $(\pi ,0)$ in an electron-doped high-${\mathrm{T}}_{\mathrm{c}}$ superconductor: a simple picture
• Coexistence of the antiferromagnetic and superconducting order and its effect on spin dynamics in electron-doped high-$T_c$ cuprates
• Inhomogeneous reduction-annealing effects on the electron-doped cuprate superconductor revealed by micro-focused angle-resolved photoemission spectroscopy
• Simulation of a hump structure in the optical scattering rate within a generalized Allen formalism and its application to copper oxide systems