Abstract
We investigate energetically favorable configurations of point disclinations in nematic films having a bump geometry. Gradual expansion in the bump width Δ gives rise to a sudden shift in the stable position of the disclinations from the top to the skirt of the bump. The positional shift observed across a threshold Δ th obeys a power law function of |Δ - Δ th |, indicating a new class of continuous phase transition that governs the defect configuration in curved nematic films.
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