2008/08/09 by H. Iwasawa, Hideaki Iwasawa, J. F. Douglas +22 · 4 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Atomic physics #Condensed matter physics #Coupling (piping) #Dispersion (optics) #Iron-based superconductors research #Isotopes of oxygen #Materials science #Nuclear magnetic resonance #Nuclear physics #Optics #Oxygen #Phonon #Photoemission spectroscopy #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Spectroscopy #X-ray photoelectron spectroscopy #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.101.157005
published as Phys. Rev. Lett. 101, 157005 (2008) · 5 pages, 3 figures
arxiv created 2008/08/09 · openalex publication_date 2008/10/09 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Angle-resolved photoemission spectroscopy with low-energy tunable photons along the nodal direction of oxygen isotope substituted Bi(2)Sr(2)CaCu(2)O(8+delta) reveals a distinct oxygen isotope shift near the electron-boson coupling "kink" in the electronic dispersion. The magnitude (a few meV) and direction of the kink shift are as expected due to the measured isotopic shift of phonon frequency, and are also in agreement with theoretical expectations. This demonstrates the participation of the phonons as dominant players, as well as pinpointing the most relevant of the phonon branches.