Prospect of quantum anomalous Hall and quantum spin Hall effect in doped kagome lattice Mott insulators

Daniel Guterding, Harald Olaf Jeschke, Roser Valentí

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

Electronic states with non-trivial topology host a number of novel phenomena with potential for revolutionizing information technology. The quantum anomalous Hall effect provides spin-polarized dissipation-free transport of electrons, while the quantum spin Hall effect in combination with superconductivity has been proposed as the basis for realizing decoherence-free quantum computing. We introduce a new strategy for realizing these effects, namely by hole and electron doping kagome lattice Mott insulators through, for instance, chemical substitution. As an example, we apply this new approach to the natural mineral herbertsmithite. We prove the feasibility of the proposed modifications by performing ab-initio density functional theory calculations and demonstrate the occurrence of the predicted effects using realistic models. Our results herald a new family of quantum anomalous Hall and quantum spin Hall insulators at affordable energy/temperature scales based on kagome lattices of transition metal ions.

Original languageEnglish
Article number25988
JournalScientific reports
Volume6
DOIs
Publication statusPublished - May 17 2016
Externally publishedYes

ASJC Scopus subject areas

  • General

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