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- W3041985092 abstract "The exact solution of Kitaev's spin-$1/2$ honeycomb spin-liquid model has sparked an intense search for Mott insulators hosting bond-dependent Kitaev interactions, of which ${mathrm{Na}}_{2}{mathrm{IrO}}_{3}$ and $ensuremath{alpha}text{ensuremath{-}}mathrm{Ru}{mathrm{Cl}}_{3}$ are prime examples. Subsequently, it has been proposed that also spin-1 and spin-$3/2$ analogs of Kitaev interactions may occur in materials with strong spin-orbit coupling. As a minimal model to describe these Kitaev materials, we study the Heisenberg-Kitaev Hamiltonian in a consistent $1/S$ expansion, with $S$ being the spin size. We present a comprehensive study of this model in the presence of an external magnetic field applied along two different directions, [001] and [111], for which an intricate classical phase diagram has been reported. In both settings, we employ spin-wave theory in a number of ordered phases to compute phase boundaries at the next-to-leading order in $1/S$ and show that quantum corrections substantially modify the classical phase diagram. More broadly, our work presents a consistent route to investigate the leading quantum corrections in spin models that break spin-rotational symmetry." @default.
- W3041985092 created "2020-07-16" @default.
- W3041985092 creator A5016638851 @default.
- W3041985092 creator A5046254742 @default.
- W3041985092 creator A5057923893 @default.
- W3041985092 creator A5071179351 @default.
- W3041985092 date "2020-10-22" @default.
- W3041985092 modified "2023-10-16" @default.
- W3041985092 title "Heisenberg-Kitaev model in a magnetic field: <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mn>1</mml:mn><mml:mo>/</mml:mo><mml:mi>S</mml:mi></mml:mrow></mml:math> expansion" @default.
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- W3041985092 doi "https://doi.org/10.1103/physrevb.102.155134" @default.
- W3041985092 hasPublicationYear "2020" @default.
- W3041985092 type Work @default.