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Challenges in design of Kitaev materials: Magnetic interactions from competing energy scales

Stephen M. Winter, Ying Li, Harald O. Jeschke, and Roser Valentí
Phys. Rev. B 93, 214431 – Published 27 June 2016

Abstract

In this study, we reanalyze the magnetic interactions in the Kitaev spin-liquid candidate materials Na2IrO3,αRuCl3, and αLi2IrO3 using nonperturbative exact diagonalization methods. These methods are more appropriate given the relatively itinerant nature of the systems suggested in previous works. We treat all interactions up to third neighbors on equal footing. The computed terms reveal significant long-range coupling, bond anisotropy, and/or off-diagonal couplings which we argue naturally explain the observed ordered phases in these systems. Given these observations, the potential for realizing the spin-liquid state in real materials is analyzed, and synthetic challenges are defined and explained.

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  • Received 21 March 2016
  • Revised 20 May 2016

DOI:https://doi.org/10.1103/PhysRevB.93.214431

©2016 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Stephen M. Winter, Ying Li, Harald O. Jeschke, and Roser Valentí

  • Institut fur Theoretische Physik, Goethe-Universitat Frankfurt, 60438 Frankfurt am Main, Germany

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Issue

Vol. 93, Iss. 21 — 1 June 2016

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