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Creators/Authors contains: "Park, Myeonggon"

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  1. ; (, Physical Review E)
    Janus colloidal particles have ‘spin’ vectors normal to their Janus equator and resulting spin orientational order that differs from orientational order considered in traditional models of hexatic melting. Based on imaging their monolayers experimentally, we describe their topological spin defects and show that the BKT (Berezinskii–Kosterlitz–Thouless) model describes their orientational order when spin orientations are driven into 2D by external AC electric field. This is nontrivial as the model assumes isotropic nearest-neighbor interactions, which is not the case for this system. These experiments reveal the predictive power of this idealized model beyond the strict validity of its assumptions. 
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    Free, publicly-accessible full text available December 1, 2026
  2. ; ; ; ; ; ; ; ; ; ; et al (, Journal of the American Chemical Society)
    Free, publicly-accessible full text available November 5, 2026