Electronic Quasiparticle Renormalization on the Spin Wave Energy Scale

J. Schäfer, D. Schrupp, Eli Rotenberg, K. Rossnagel, H. Koh, P. Blaha, and R. Claessen
Phys. Rev. Lett. 92, 097205 – Published 4 March 2004

Abstract

High-resolution photoemission data of the (110) iron surface reveal the existence of well-defined metallic surface resonances in good correspondence to band calculations. Close to the Fermi level, their dispersion and momentum broadening display anomalies characteristic of quasiparticle renormalization due to coupling to bosonic excitations. Its energy scale exceeds that of phonons by far, and is in striking coincidence with that of the spin wave spectrum in iron. The self-energy behavior thus gives spectroscopic evidence of a quasiparticle mass enhancement due to electron-magnon coupling.

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  • Received 8 October 2003

DOI:https://doi.org/10.1103/PhysRevLett.92.097205

©2004 American Physical Society

Authors & Affiliations

J. Schäfer1, D. Schrupp1, Eli Rotenberg2, K. Rossnagel2, H. Koh2, P. Blaha3, and R. Claessen1

  • 1Institut für Physik, Universität Augsburg, 86135 Augsburg, Germany
  • 2Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
  • 3Institut für Materialchemie, Technische Universität Wien, A-1060 Wien, Austria

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Issue

Vol. 92, Iss. 9 — 5 March 2004

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