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- W3002455055 abstract "We present a unified description of the response of the hyperhoneycomb Kitaev magnet $beta$-$text{Li}_2text{IrO}_3$ to applied magnetic fields along the orthorhombic directions ${bf a}$, ${bf b}$ and ${bf c}$. This description is based on the minimal nearest-neighbor $J$-$K$-$Gamma$ model and builds on the idea that the incommensurate counter-rotating order observed experimentally at zero field can be treated as a long-distance twisting of a nearby commensurate order with six spin sublattices. The results reveal that the behavior of the system for ${bf H}parallel{bf a}$, ${bf H}parallel{bf b}$ and ${bf H}parallel{bf c}$ share a number of qualitative features, including: i) a strong intertwining of the modulated, counter-rotating order with a set of uniform orders; ii) the disappearance of the modulated order at a critical field $H^ast$, whose value is strongly anisotropic with $H_{bf b}^ast!<!H_{bf c}^ast!ll!H_{bf a}^ast$; iii) the presence of a robust zigzag phase above $H^ast$; and iv) the fulfillment of the Bragg peak intensity sum rule. It is noteworthy that the disappearance of the modulated order for ${bf H}parallel{bf c}$ proceeds via a `metamagnetic' first-order transition which does not restore all broken symmetries. This implies the existence of a second finite-$T$ phase transition at higher magnetic fields. We also demonstrate that quantum fluctuations give rise to a significant reduction of the local moments for all directions of the field. The results for the total magnetization for ${bf H}parallel{bf b}$ are consistent with available data and confirm a previous assertion that the system is very close to the highly-frustrated $K$-$Gamma$ line in parameter space. Our predictions for the magnetic response for fields along ${bf a}$ and ${bf c}$ await experimental verification." @default.
- W3002455055 created "2020-01-30" @default.
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- W3002455055 date "2020-01-22" @default.
- W3002455055 modified "2023-09-26" @default.
- W3002455055 title "Unconventional magnetic field response of the hyperhoneycomb Kitaev magnet <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mi>β</mml:mi><mml:mo>−</mml:mo><mml:msub><mml:mi>Li</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>IrO</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math>" @default.
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- W3002455055 doi "https://doi.org/10.1103/physrevresearch.2.013065" @default.
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