Spectral function and conductivity in the normal state of the cuprates: a spin fluctuation study

Abstract

We study the spectral function $A_k(\omega )$ and the optical conductivity ${\sigma }_1(\omega )$ for a system of fermions interacting with their collective spin fluctuations (the spin-fermion model), and apply the results to optimally doped cuprates in the normal state. We show that there is no qualitative distinction between hot and cold regions in the Brillouin zone - in both cases, there exists a wide range of frequencies where the width of the peak in $A_k(\omega )$ scales linearly with $\omega$. We demonstrate that ${\sigma }_1(\omega )$ is inversely linear in $\omega$ up to very high frequencies. We argue that these results agree {\it quantitatively} with the photoemission and optical data for $Bi2212$.

5 pages, 3 figures

References in corpus (4)

• A relation between the resonance neutron peak and ARPES data in cuprates
• Quasiparticles in the superconducting state of Bi2Sr2CaCu2O8
• What angle-resolved photemission experiments tell about the microscopic theory for high-temperature superconductors
• Magnetotransport in nearly antiferromagnetic metals

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• On the optical conductivity of Electron-Doped Cuprates I: Mott Physics
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• Analysis of the elementary excitations in high-T_c cuprates: explanation of the new energy scale observed by ARPES
• Singularities in the optical response of cuprates
• Identifying the Background Signal in ARPES of High Temperature Superconductors
• ARPES in the normal state of the cuprates: comparing the marginal Fermi liquid and spin fluctuation scenarios
• Optical conductivity of a two-dimensional metal at the onset of spin-density-wave order
• Developments in the negative-U modelling of the cuprate HTSC systems
• Quasiparticles in high temperature superconductors: consistency of angle resolved photoemission and optical conductivity
• Optical symmetries and anisotropic transport in high-Tc superconductors
• On the origin of the hump structure in the in-plane optical conductivity of high Tc cuprates based on a SU(2) slave-boson theory
• On the Origin of Peak-dip-hump Structure in the In-plane Optical Conductivity of the High $T_C$ Cuprates; Role of Antiferromagnetic Spin Fluctuations of Short Range Order