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Disorder and quasiparticle interference in heavy-fermion materials

Francesco Parisen Toldin, Jeremy Figgins, Stefan Kirchner, and Dirk K. Morr
Phys. Rev. B 88, 081101(R) – Published 5 August 2013

Abstract

Using a large-N approach, we study the effect of disorder in the Kondo-screened phase of heavy-fermion materials. We demonstrate that the strong feedback between the hybridization and the conduction electron charge density magnifies the effect of disorder, such that already small concentrations of defects strongly disorder the materials’ local electronic structure, while only weakly affecting their spatially averaged, thermodynamic properties. Finally, we show that the microscopic nature of defects can be identified through their characteristic signatures in the hybridization and quasiparticle interference spectrum.

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  • Received 28 September 2012

DOI:https://doi.org/10.1103/PhysRevB.88.081101

©2013 American Physical Society

Authors & Affiliations

Francesco Parisen Toldin1, Jeremy Figgins2, Stefan Kirchner1,3, and Dirk K. Morr1,2

  • 1Max-Planck-Institut für Physik komplexer Systeme, Nöthnitzer Straße 38, D-01187 Dresden, Germany
  • 2Department of Physics, University of Illinois at Chicago, Chicago, Illinois 60607, USA
  • 3Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, D-01187 Dresden, Germany

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Issue

Vol. 88, Iss. 8 — 15 August 2013

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