Optical Sum Rules that Relate to the Potential Energy of Strongly Correlated Systems

J. K. Freericks, T. P. Devereaux, M. Moraghebi, and S. L. Cooper
Phys. Rev. Lett. 94, 216401 – Published 3 June 2005

Abstract

A class of sum rules for inelastic light scattering is developed. We show that the first moment of the nonresonant response provides information about the potential energy in strongly correlated systems. The polarization dependence of the sum rules provides information about the electronic excitations in different regions of the Brillouin zone. We determine the sum rule for the Falicov-Kimball model, which possesses a metal-insulator transition, and compare our results to the light scattering experiments in SmB6.

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  • Received 11 January 2005

DOI:https://doi.org/10.1103/PhysRevLett.94.216401

©2005 American Physical Society

Authors & Affiliations

J. K. Freericks1, T. P. Devereaux2, M. Moraghebi2, and S. L. Cooper3

  • 1Department of Physics, Georgetown University, Washington, District of Columbia 20057, USA
  • 2Department of Physics, University of Waterloo, Waterloo, Ontario, Canada
  • 3Department of Physics and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana- Champaign, Urbana, Illinois 61801 USA

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Issue

Vol. 94, Iss. 21 — 3 June 2005

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