Can the bosonic coupling constant be extracted from the ARPES scattering rate in cuprate superconductors?
| dc.creator | Kulic, Miodrag L. | |
| dc.date | 2004-04-19 | |
| dc.date.accessioned | 2026-07-07T02:57:42Z | |
| dc.date.available | 2026-07-07T02:57:42Z | |
| dc.description | The recent ARPES results for the imaginary part of the self-energy obtained on a number of HTSC bismuthates \cite{Kordyuk} are analyzed. By accepting the ''Fermi-Bose'' {\it division-procedure} of the self-energy into the Fermi-liquid and bosonic parts - which is proposed in \cite{Kordyuk}, one obtains very small bosonic coupling constant $λ_{B, Im} <0.2$. If this procedure would be correct then the standard Eliashberg theory makes any bosonic mechanism of pairing irrelevant. As a consequence we are confronted with a trilemma: (1) to abandon the ``Fermi-Bose'' division-procedure \cite{Kordyuk}; (2) to abandon the Eliashberg theory; (3) to abandon the interpretation of ARPES data within the three-step model, where the ARPES intensity is proportional to the quasiparticle spectral function $A(\mathbf{k},ω)$. However, since the bosonic coupling constant extracted from the ARPES nodal kink at 70 meV \cite{Lanzara}, which measures the real part of the self-energy is much larger than the one extracted from the ARPES line-width this means that the ``Fermi-Bose'' division procedure done in \cite{Kordyuk} is ambiguous. | |
| dc.description | 3 pages, 1 figure | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0404441 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0404441 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/23772 | |
| dc.subject | Superconductivity | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Can the bosonic coupling constant be extracted from the ARPES scattering rate in cuprate superconductors? | |
| dc.type | text |