Orientational and positional order in flux lattices of type-II superconductors
Eugene M. Chudnovsky
DOI 10.1103/PhysRevB.43.7831 · Physical Review B
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Abstract
A detailed theory of a hexatic vortex glass, recently observed in high-Tc superconductors, is developed. The vortex lattice in this phase is characterized by short-range positional order, which decays as exp(-αr) in three dimensions (3D) and as exp(-βr2) in 2D, and by extended orientational correlations, which may be long range in a 3D sample and decay algebraically in a 2D film. For 2D and 3D the angular and field dependence of positional and orientational correlation functions is obtained; these may be easily tested experimentally.
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