Optical Evidence of an Electronic Contribution to the Pairing Interaction in Superconducting<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Tl</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Ba</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mro

Holcomb, Matthew J.; Collman, James P.; Little, W. A.

doi:10.1103/physrevlett.73.2360

Cited by 55 publications

(37 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The present results are consistent with other recent quasi-first-principles calculations of the optical spectra, which find that the cuprate intraband optical spectrum extends up to ∼2.5 eV, with a residual charge transfer gap, associated with the incoherent part of the band, persisting well into the overdoped regime [4,7,66,300]. Moreover, several optical studies [367,388,389] have found evidence that the onset of superconductivity affects spectral weight in an energy range extending beyond 1 eV. While optical experiments cannot separate out the relevant d-wave component of the glue, we find it has a similar energy dependence as seen by comparing Fig.…”

Section: Application To Bi2212supporting

confidence: 93%

Intermediate coupling model of the cuprates

Das

Markiewicz

Bansil

2014

Advances in Physics

View full text Add to dashboard Cite

We review the intermediate coupling model for treating electronic correlations in the cuprates. Spectral signatures of the intermediate coupling scenario are identified and used to adduce that the cuprates fall in the intermediate rather than the weak or the strong coupling limits. A robust, 'beyond LDA' framework for obtaining wide-ranging properties of the cuprates via a GW-approximation based self-consistent self-energy correction for incorporating correlation effects is delineated. In this way, doping and temperature dependent spectra, from the undoped insulator to the overdoped metal, in the normal as well as the superconducting state, with features of both weak and strong coupling can be modeled in a material-specific manner with very few parameters. Efficacy of the model is shown by considering available spectroscopic data on electron and hole doped cuprates from angle-resolved photoemission (ARPES), scanning tunneling microscopy/spectroscopy (STM/STS), neutron scattering, inelastic light scattering, optical and other experiments. Generalizations to treat systems with multiple correlated bands such as the heavy-fermions, the ruthenates, and the actinides are discussed.

show abstract

Section: Application To Bi2212supporting

confidence: 93%

Intermediate coupling model of the cuprates

Das

Markiewicz

Bansil

2014

Advances in Physics

View full text Add to dashboard Cite

show abstract

“…3(a), the averageχ s is compared to individual χ s peaks, demonstrating that there is significant anisotropy in χ s . The weight inχ s extends to energies ∼1.5 eV, in good agreement with early optical determinations 31 . Figure 3(b) compares the calculated Σ using either the correct expression, Eq.…”

Section: Testing Optical Inversion Schemessupporting

confidence: 85%

Self-energy and fluctuation spectra in cuprates: Comparing optical and photoemission results

2012

View full text Add to dashboard Cite

We compare efforts to extract self energies and fluctuation spectra of the cuprates using optical and photoemission techniques. The fluctuations have contributions from both the coherent and incoherent parts of the band, which are spread over the full bare bandwidth of > 2 eV. Many experimental studies concentrate on the coherent part of the band and hence miss higher energy fluctuations. Our study establishes the universal presence of high energy bosonic fluctuations across various spectroscopies as a key ingredient in the high temperature superconducting cuprates.

show abstract

“…In addition to strong electron-phonon interactions, there is a pronounced coupling feature at an energy of about 2 eV in the optical reflectance data 74,75 . In Fig.…”

Section: Strong Coupling Between Electrons and Cu-o Charge-transfermentioning

confidence: 99%

Pairing interactions and pairing mechanism in high-temperature copper oxide superconductors

Zhao

2005

Phys. Rev. B

View full text Add to dashboard Cite

The polaron binding energy Ep in undoped parent cuprates has been determined to be about 1.0 eV from the unconventional oxygen-isotope effect on the antiferromagnetic ordering temperature. The deduced value of Ep is in quantitative agreement with that estimated from independent optical data and that estimated theoretically from the measured dielectric constants. The substantial oxygenisotope effect on the in-plane supercarrier mass observed in optimally doped cuprates suggests that polarons are bound into the Cooper pairs. We also identify the phonon modes that are strongly coupled to conduction electrons from the angle-resolved photoemission spectroscopy, tunneling spectra, and optical data. We consistently show that there is a very strong electron-phonon coupling feature at a phonon energy of about 20 meV along the antinodal direction and that this coupling becomes weaker towards the diagonal direction. We further show that high-temperature superconductivity in cuprates is caused by strong electron-phonon coupling, polaronic effect, and significant coupling with 2 eV Cu-O charge transfer fluctuation.

show abstract

Optical Evidence of an Electronic Contribution to the Pairing Interaction in SuperconductingTl2Ba2

Cited by 55 publications

References 37 publications

Intermediate coupling model of the cuprates

Intermediate coupling model of the cuprates

Self-energy and fluctuation spectra in cuprates: Comparing optical and photoemission results

Pairing interactions and pairing mechanism in high-temperature copper oxide superconductors

Contact Info

Product

Resources

About