Spin singlet and quasiparticles excitations in cuprate superconductors

Abstract

We followed step by step the transition from an antiferromagnetic (AF) Mott insulator to a superconducting (SC) metal in the Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ (Bi-2212) cuprate using the electronic Raman scattering spectroscopy. This was achieved by tracking the doping dependence of the spin singlet excitation originate from the AF Mott insulator, the normal state quasiparticles excitation related to the mobile charge carriers and the Bogoliubov quasiparticles related to the SC gap. We show that the signature of the pseudogap phase which develops during this transition, can be interpreted as the blocking of charge carriers by the enhancement of the antiferromagnetic correlations as the temperature drops. We find that the energy scale of the pseudogap, ${\Delta }_{\text{pg}}(p)$, closely follows the one of the spin singlet excitation, ${\Delta }_{\text{sse}}(p)$, with doping $p$. The quasiparticles lifetime considerably increases with doping when the pseudogap collapses. We reveal that the maximum amplitude of the SC gap, ${\Delta }_{\text{sc}}^{\text{max}}$ and the SC transition temperature \Tc are linked in an extended range of doping such as ${\Delta }_{\text{sc}}^{\text{max}}(p)\propto {\Delta }_{\text{sse}}(p)T_c(p)$. This relation suggests that the AF correlations play a key role in the mechanism of superconductivity.

9 pages, 6 figures

References in corpus (46)

• The pseudogap in high-temperature superconductors: an experimental survey
• Long-range incommensurate charge fluctuations in (Y,Nd)Ba2Cu3O(6+x)
• Destruction of the Fermi Surface in Underdoped High Tc Superconductors
• Inelastic Light Scattering From Correlated Electrons
• The doping dependence of T* - what is the real high-Tc phase diagram?
• Broken rotational symmetry in the pseudogap phase of a high-Tc superconductor
• Magnetic order in the pseudogap phase of high-$T_C$ superconductors
• Intense paramagnon excitations in a large family of high-temperature superconductors
• How Cooper pairs vanish approaching the Mott insulator in Bi2Sr2CaCu2O8+d
• Two Energy Scales and two Quasiparticle Dynamics in the Superconducting State of Underdoped Cuprates
• The remarkable underlying ground states of cuprate superconductors
• Pseudogap induced by short-range spin correlations in a doped Mott insulator
• The Electronic Nature of High Temperature Cuprate Superconductors
• Emergence of charge order from the vortex state of a high temperature superconductor
• Coherent quasiparticle weight and its connection to high-T_c superconductivity from angle-resolved photoemission
• Evolution of Magnetic and Superconducting Fluctuations with Doping of High-Tc Superconductors
• Pseudogap and Fermi surface topology in the two-dimensional Hubbard model
• Hidden magnetism at the pseudogap critical point of a high temperature superconductor
• Intimate link between Charge Density Wave, Pseudogap and Superconducting Energy Scales in Cuprates
• On the Electron Pairing Mechanism of Copper-Oxide High Temperature Superconductivity
• Resonant two-magnon Raman scattering in parent compounds of high-T${}_c$ superconductors.
• Scaling of the superfluid density in high-temperature superconductors
• Observation of an unconventional metal-insulator transition in overdoped CuO_2 compounds
• Fermi surface transformation at the pseudogap critical point of a cuprate superconductor
• Relation between the superconducting gap energy and the two-magnon Raman peak energy in Bi2Sr2Ca{1-x}YxCu2O{8+δ}
• Evolution of the gaps through the cuprate phase-diagram
• Large Bi-2212 single crystal growth by the floating-zone technique
• Paramagnons and high-temperature superconductivity in mercury-based cuprates
• Two-particle response in Cluster Dynamical Mean-Field Theory: Formalism and application to the Raman Response of High-temperature Superconductors
• Raman study of carrier-overdoping effects on the gap in high-Tc superconducting cuprates
• Doping dependence of the electronic Raman spectra in cuprates
• Vertical temperature-boundary of the pseudogap under the superconducting dome of the Bi2Sr2CaCu2O8+d phase-diagram
• Quantitative Raman measurements of the evolution of the Cooper-pairs density with doping in Bi2Sr2CaCu2O8+d superconductors
• Relationship among superconductivity, pseudogap, and high-energy magnetic fluctuations in a model high-Tc superconductor from electronic Raman scattering
• Doping dependence of the superconducting gap in Bi2Sr2CaCu2O{8 + delta}
• Electronic Raman Scattering in Superconducting Cuprates
• First-Order Type Effects in YBa${}_2$Cu${}_3$O${}_{6+x}$ at the Onset of Superconductivity
• Superconducting and Pseudogap effects on the interplane conductivity and Raman scattering cross section in the two dimensional Hubbard Model
• Higgs Mode and Magnon Interactions in 2D Quantum Antiferromagnets from Raman Scattering
• Unconventional high-energy-state contribution to the Cooper pairing in under-doped copper-oxide superconductor HgBa${}_2$Ca${}_2$Cu${}_3$O${}_{8+\delta }$
• Magnetic excitations and amplitude fluctuations in insulating cuprates
• Unambiguous connection between the Fermi surface topology and the pseudogap in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+d}$
• Three energy scales in the superconducting state of hole-doped cuprates detected by electronic Raman scattering
• Universal relationship between the energy scales of the pseudogap phase, the superconducting state and the charge density wave order in copper oxide superconductors
• Raman Response in Doped Antiferromagnets
• Coupled electronic and magnetic excitations in the cuprates and their role in the superconducting transition

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