Extracting the electron--boson spectral function $α^2$F($ω$) from infrared and photoemission data using inverse theory

Details Extracting the electron--boson spectral function $α^2$F($ω$) from infrared and photoemission data using inverse theory Extracting the electron--boson spectral function $α^2$F($ω$) from infrared and photoemission data using inverse theory

2004-11-01

arxiv.org/abs/cond-mat/0411043v1

Phys. Rev. B 71, 104529 (2005).

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1103/PhysRevB.71.104529

We present a new method of extracting electron-boson spectral function $\alpha^2$F($\omega$) from infrared and photoemission data. This procedure is based on inverse theory and will be shown to be superior to previous techniques. Numerical implementation of the algorithm is presented in detail and then used to accurately determine the doping and temperature dependence of the spectral function in several families of high-T$_c$ superconductors. Principal limitations of extracting $\alpha^2$F($\omega$) from experimental data will be pointed out. We directly compare the IR and ARPES $\alpha^2$F($\omega$) and discuss the resonance structure in the spectra in terms of existing theoretical models.

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