Local environment effects on a charge carrier injected into an Ising chain

Mirko Möller and Mona Berciu
Phys. Rev. B 90, 075145 – Published 26 August 2014

Abstract

We present numerically exact results for the spectral function of a single charge carrier that is injected into an Ising chain at finite temperature T. Both ferromagnetic and antiferromagnetic coupling between the Ising spins are considered. The interaction between the carrier and the Ising spins is assumed to be on-site and of Ising type, as well. We find that the carrier's spectral function exhibits a distinctive fine structure of resonances that are due to the temporary entrapping of the carrier inside small magnetic domains. The connection to models of disordered binary alloys where similar effects can occur is explained. We use these results to construct an accurate (quasi)analytic approximation for low and medium-T spectral functions.

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  • Received 5 May 2014
  • Revised 18 July 2014

DOI:https://doi.org/10.1103/PhysRevB.90.075145

©2014 American Physical Society

Authors & Affiliations

Mirko Möller1 and Mona Berciu1,2

  • 1Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
  • 2Quantum Matter Institute, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z4

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Issue

Vol. 90, Iss. 7 — 15 August 2014

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