Superconducting coherence peak in the electronic excitations of a single layer cuprate superconductor $B{i}_{2}S{r}_{1.6}L{a}_{0.4}Cu{O}_{6+\delta }$

Abstract

Angle resolved photoemission spectroscopy study is reported on a high quality optimally doped Bi2Sr1.6La0.4CuO6+delta high Tc superconductor. In the antinodal region with maximal d-wave gap, the symbolic superconducting coherence peak, which has been widely observed in multi-CuO2-layer cuprate superconductors, is unambiguously observed in a single layer system. The associated peak-dip separation is just about 19 meV, which is much smaller than its counterparts in multi-layered compounds, but correlates with the energy scales of spin excitations in single layer cuprates.

5 pages, 4 figures

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• Nodal quasiparticle meltdown in ultra-high resolution pump-probe angle-resolved photoemission
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• Bosons in high temperature superconductors: an experimental survey
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• Observation of a d-wave nodal liquid in highly underdoped Bi_2Sr_2CaCu_2O_{8+δ}
• First direct observation of the Van Hove singularity in the tunneling spectra of cuprates
• Energy-scale phenomenology and pairing via resonant spin-charge motion in FeAs, CuO, heavy-fermion and other exotic superconductors
• Superconducting electronic state in optimally doped YBa2Cu3O7-d observed with laser-excited angle-resolved photoemission spectroscopy
• Spectroscopic evidence for preformed Cooper pairs in the pseudogap phase of cuprates
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• Three energy scales characterizing the competing pseudogap state, the incoherent, and the coherent superconducting state in high-Tc cuprates
• Charge density waves as the origin of dip-hump structures in differential tunneling conductance of cuprates: the case of $d$-wave superconductivity
• Two pseudogaps with different energy scales at the antinode of the high-temperature Bi${}_2$Sr${}_2$CuO${}_6$ superconductor using angle-resolved photoemission spectroscopy
• Peak-structure in self-energy of cuprate superconductors
• Three interaction energy scales in single-layer high-T${}_C$ cuprate HgBa${}_2$CuO${}_{4+\delta }$
• Anisotropic dressing of electrons in electron-doped cuprate superconductors
• Determination of the superconducting gap in near optimally doped Bi_2Sr_{2-x}La_xCuO_{6+δ} (x ~ 0.4) from low-temperature specific heat
• Low-temperature T-linear resistivity in the strange metal phase of overdoped cuprate superconductors due to umklapp scattering from a spin excitation
• Particle-hole symmetry breaking in the pseudogap state of Pb0.55Bi1.5Sr1.6La0.4CuO6+d: A quantum-chemical perspective
• Enhancement of superconductivity by electronic nematicity in cuprate superconductors
• Pseudogap Suppression by Competition with Superconductivity in La-Based Cuprates
• Pseudogap in cuprate and organic superconductors
• Renormalization of electrons in bilayer cuprate superconductors
• Valence bond glass -- A unified theory of electronic disorder and pseudogap phenomena in high temperature superconductors
• Origin of the pseudogap and its influence on superconducting state
• Unusual electronic structure in underdoped cuprate superconductors
• BCS-BEC crossover driven by small Fermi pockets of a high-Tc cuprate superconductor
• Impurity-Scattering Assisted Umklapp Scattering as the Origin of Low-Temperature Resistivity in the Normal-State of Cuprate Superconductors