Near-room-temperature Chern insulator and Dirac spin-gapless semiconductor : nickel chloride monolayer

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Junjie He
  • Xiao Li
  • Pengbo Lyu
  • Petr Nachtigall

Detail(s)

Original languageEnglish
Pages (from-to)2246-2252
Journal / PublicationNanoscale
Volume9
Issue number6
Publication statusPublished - 14 Feb 2017
Externally publishedYes

Link(s)

Abstract

A great obstacle for practical applications of the quantum anomalous Hall (QAH) effect is the lack of suitable QAH materials (Chern insulators) with a large non-trivial band gap, room-temperature magnetic order and high carrier mobility. y. Based on first-principles calculations it is shown here that a nickel chloride (NiCl3) monolayer has all these characteristics. Thus, the NiCl3 monolayer represents a new class of Dirac materials with Dirac spin-gapless semiconducting properties and high-temperature ferromagnetism (∼400 K). Taking into account the spin–orbit coupling, the NiCl3 monolayer becomes an intrinsic Chern insulator with a large non-trivial band gap of ∼24 meV, corresponding to an operating temperature as high as ∼280 K at which the quantum anomalous Hall effect could be observed. The calculated large non-trivial gap, high Curie temperature and single-spin Dirac states reported herein for the NiCl3 monolayer led us to propose that this material gives a great promise for potential realization of a near-room temperature QAH effect and potential applications in spintronics. Last but not least the calculated Fermi velocities of Dirac fermions of about 4 × 105 m s−1 indicate very high mobility in NiCl3 monolayers. © The Royal Society of Chemistry 2017

Research Area(s)

Citation Format(s)

Near-room-temperature Chern insulator and Dirac spin-gapless semiconductor : nickel chloride monolayer. / He, Junjie; Li, Xiao; Lyu, Pengbo; Nachtigall, Petr.

In: Nanoscale, Vol. 9, No. 6, 14.02.2017, p. 2246-2252.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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