English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We analyze the ultra high resolution laser angle resolved photo-emissionspectroscopy (ARPES) intensity from the slightly underdopedBi$_2$Sr$_2$CaCu$_2$O$_{8+\delta}$ in the superconductive (SC) state. Themomentum distribution curves (MDC) were fitted at each energy $\w$ employingthe SC Green's function along several cuts perpendicular to the Fermi surfacewith the tilt angle $\theta$ with respect to the nodal cut. The clearobservation of particle-hole mixing was utilized such that the complexself-energy as a function of $\omega$ is directly obtained from the fitting.The obtained angle resolved self-energy is then used to deduce the Eliashbergfunction $\alpha^2 F^{(+)}(\th,\w)$ in the diagonal channel by inverting thed-wave Eliashberg equation using the maximum entropy method. Besides a broadfeatureless spectrum up to the cutoff energy $\omega_c$, the deduced $\alpha^2F$ exhibits two peaks around 0.05 eV and 0.015 eV. The former and the broadfeature are already present in the normal state, while the latter emerges onlybelow $T_c$. Both peaks become enhanced as $T$ is lowered or the angle $\th$moves away from the nodal direction. The implication of these findings arediscussed.

Analysis of Laser ARPES from Bi$_2$Sr$_2$CaCu$_2$O$_{8+\delta}$ in superconductive state: angle resolved self-energy and fluctuation spectrum