Electronic Spectra and Their Relation to the (pi,pi) Collective Mode in High-Tc Superconductors

Abstract

Photoemission spectra of Bi2Sr2CaCu2O8 reveal that the high energy feature near (pi,0), the "hump", scales with the superconducting gap and persists above Tc in the pseudogap phase. As the doping decreases, the dispersion of the hump increasingly reflects the wavevector (pi,pi) characteristic of the undoped insulator, despite the presence of a large Fermi surface. This can be understood from the interaction of the electrons with a collective mode, supported by our observation that the doping dependence of the resonance observed by neutron scattering is the same as that inferred from our data.

4 pages (revtex), 5 figures (eps)

References in corpus (15)

• Dimerization and Incommensurate Spiral Spin Correlations in the Zigzag Spin Chain: Analogies to the Kondo Lattice
• Theory of Underdoped Cuprates
• Neutron Scattering from Magnetic Excitations in Bi_2 Sr_2 Ca_2 O_8+delta
• The Magnetic Excitation Spectrum and Thermodynamics of High-$T_c$ Superconductors
• Photoemission Evidence for a Remnant Fermi Surface and d-Wave-Like Dispersion in Insulating Ca2CuO2Cl2
• Evolution of the Fermi surface with carrier concentration in Bi_2Sr_2CaCu_2O_{8+δ}
• Electronic excitations in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_8$ : Fermi surface, dispersion, and absence of bilayer splitting
• Bosonic Mode Mixing in the Superconducting State Spectral Function of Bi_2Sr_2CaCu_2O_{8+delta}
• Weak Pseudogap Behavior in the Underdoped Cuprate Superconductors
• Predominantly Superconducting Origin of Large Energy Gaps in Underdoped Bi2Sr2CaCu2O8-d from Tunneling Spectroscopy
• Theory of the Resonant Neutron Scattering of High $T_c$ Superconductors
• Evidence for Quasiparticle Decay in Photoemission from Underdoped Cuprates
• Magnetic Dynamics in Underdoped YBCO: Direct Observation of a Superconducting Gap
• Pseudogaps and their Interplay with Magnetic Excitations in the doped 2D Hubbard Model
• ARPES study of the superconducting gap and pseudogap in Bi2Sr2CaCu2O8+x

Cited by in corpus (183)

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