Isotopic shift in angle-resolved photoemission spectra of Bi2Sr2CaCu2O8 due to quadratic electron-phonon coupling
Kai Ji, Keiichiro Nasu
TL;DR
This paper explains the isotope-induced band shift in ARPES spectra of Bi2Sr2CaCu2O8 using a quadratic electron-phonon coupling model, supported by Hartree-Fock and quantum Monte Carlo calculations.
Contribution
It introduces a quadratic electron-phonon coupling model to explain isotope effects in ARPES spectra of a high-temperature superconductor, supported by numerical methods.
Findings
Band shift explained by quadratic e-ph coupling
Large ratio of band shift to phonon energy change due to phonon softening
Sign change in band shift linked to momentum dependence of e-ph coupling
Abstract
In connection with the experiment on oxygen isotope effect of Bi2Sr2CaCu2O8 with the angle-resolved photoemission spectroscopy (ARPES), we theoretically study the isotope-induced band shift in ARPES by the Hartree-Fork and quantum Monte Carlo methods. We find that this band shift can be clarified based on a quadratically coupled electron-phonon (e-ph) model. The large ratio of band shift versus phonon energy change is connected with the softening effect of phonon, and the positive-negative sign change is due to the momentum dependence of the e-ph coupling.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.