High-Energy Magnetic Excitations in the Cuprate Superconductor Bi2Sr2CaCu2O8+δ: Towards a Unified Description of Its Electronic and Magnetic Degrees of Freedom

M. P. M. Dean, A. J. A. James, R. S. Springell, X. Liu, C. Monney, K. J. Zhou, R. M. Konik, J. S. Wen, Z. J. Xu, G. D. Gu, V. N. Strocov, T. Schmitt, and J. P. Hill
Phys. Rev. Lett. 110, 147001 – Published 3 April 2013
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Abstract

We investigate the high-energy magnetic excitation spectrum of the high-Tc cuprate superconductor Bi2Sr2CaCu2O8+δ (Bi-2212) using Cu L3 edge resonant inelastic x-ray scattering. Broad, dispersive magnetic excitations are observed, with a zone boundary energy of 300meV and a weak dependence on doping. These excitations are strikingly similar to the bosons proposed to explain the high-energy “kink” observed in photoemission. A phenomenological calculation of the spin response, based on a parametrization of the the angle-resolved photoemission spectroscopy derived electronic structure and Yang-Rice-Zhang quasiparticles, provides a reasonable prediction of the energy dispersion of the observed magnetic excitations. These results indicate a possible unified framework to reconcile the magnetic and electronic properties of the cuprates and we discuss the advantages and disadvantages of such an approach.

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  • Received 26 November 2012

DOI:https://doi.org/10.1103/PhysRevLett.110.147001

© 2013 American Physical Society

Authors & Affiliations

M. P. M. Dean1,*, A. J. A. James1, R. S. Springell2,3, X. Liu1,†, C. Monney4, K. J. Zhou4,‡, R. M. Konik1, J. S. Wen1, Z. J. Xu1, G. D. Gu1, V. N. Strocov4, T. Schmitt4, and J. P. Hill1,§

  • 1Department of Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Upton, New York 11973, USA
  • 2Royal Commission for the Exhibition of 1851 Research Fellow, Interface Analysis Centre, University of Bristol, Bristol BS2 8BS, United Kingdom
  • 3London Centre for Nanotechnology and Department of Physics and Astronomy, University College London, London WC1E 6BT, United Kingdom
  • 4Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland

  • *mdean@bnl.gov
  • Present address: Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
  • Present address: Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE, United Kingdom.
  • §hill@bnl.gov

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Vol. 110, Iss. 14 — 5 April 2013

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