Isotopic fingerprint of electron-phonon coupling in high-Tc cuprates

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 m...

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Bibliographic Details
Published in:Physical review letters 2008-10, Vol.101 (15), p.157005-157005
Main Authors: Iwasawa, H, Douglas, J F, Sato, K, Masui, T, Yoshida, Y, Sun, Z, Eisaki, H, Bando, H, Ino, A, Arita, M, Shimada, K, Namatame, H, Taniguchi, M, Tajima, S, Uchida, S, Saitoh, T, Dessau, D S, Aiura, Y
Format: Article
Language:English
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Summary: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.
ISSN:0031-9007
DOI:10.1103/PhysRevLett.101.157005