Flux Lattice Melting and the onset of Hc2 fluctuations
Stephen W. Pierson, Oriol T. Valls
Abstract
The flux lattice melting temperature in optimally doped YBCO has been shown to be very close to that of the onset of fluctuations around Hc2(T). Here, we present a theoretical argument in support of the idea that this occurs because the increased strength of the fluctuations as a function of magnetic field pushes away the first order flux lattice melting transition. The argument is based on hydrodynamic considerations (the Hansen-Verlet freezing criterion). It is not specific to high-temperature superconductors and can be generalized to other systems.
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