Photoemission Spectroscopy of Low-Dimensional Charge-Density-Wave and Superconducting Materials

Xu, Peng

doi:10.5075/epfl-thesis-4791

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A Stm Tunneling Conductance and Ldos1

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2013

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“…60 Recent photoemission studies suggest that the bands form a nearly degenerate doublet, attributed to the outer CuO 2 layers, and a single band associated with the inner CuO 2 layer. 61,62 The inner-layer band is seen ∼ 70 meV (∼ 200 meV) below the doublet in the nodal (antinodal) direction. We found that a one-band model focusing on the doublet, with fewer adjustable parameters than a three-band model, is sufficient to fit the spectra in the range |ω| < 150 meV.…”

Section: A Stm Tunneling Conductance and Ldosmentioning

confidence: 99%

Strong-coupling analysis of scanning tunneling spectra in Bi$_2$Sr$_2$Ca$_2$Cu$_3$O$_{10+δ}$

Berthod,

Fasano,

Maggio-Aprile

et al. 2013

Preprint

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We study a series of spectra measured in the superconducting state of optimally-doped Bi 2 Sr 2 Ca 2 Cu 3 O 10+δ (Bi-2223) by scanning tunneling spectroscopy. Each spectrum, as well as the average of spectra presenting the same gap, is fitted using a strong-coupling model taking into account the band structure, the BCS gap, and the interaction of electrons with the spin resonance. After describing our measurements and the main characteristics of the strong-coupling model, we report the whole set of parameters determined from the fits, and we discuss trends as a function of the gap magnitude. We also simulate angle-resolved photoemission spectra, and compare with recent experimental results.

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Section: A Stm Tunneling Conductance and Ldosmentioning

confidence: 99%