Characterization of long-wavelength density uctuations in vortex matter

G. RUMI; J. ARAGÓN SÁNCHEZ; F. ELÍAS; R. CORTÉS MALDONADO; N. R. CEJAS BOLECEK; G. NIEVA; A. B. KOLTON; Y. FASANO

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Conferencia; Poster presentado en el XXIII Latin American Symposium on Solid State Physics; 2018

Hyperuniformity, i.e. the suppression of long-wavelength density uctuations, is trivially present in crystals andquasi-crystals, but it can also exist in certain amorphous systems. In the latter case, the concept of disorderedhyperuniformity has been recently developed and shown to describe unusual and interesting physical properties[1].Motivated by recent theoretical predictions suggesting that disordered hyperuniformity can arise in vortexlattices in presence of disorder [2] we experimenally study vortex matter nucleated in pristine and irradiatedsamples of Bi2Sr2CaCu2O8+ by magnetic decorations. From the digitized vortex positions we analyze the long-wavelength density uctuations, both in real and Fourier space. Our preliminary results suggest that the analizedamorphous vortex structures, corresponding to the irradiated samples, are not hyperuniform, at variance with thepristine sample.