An Infrared study of the Josephson vortex state in high-Tc cuprates
Abstract
We report the results of the c-axis infrared spectroscopy of La2-x Srx CuO4 in high magnetic field oriented parallel to the CuO2 planes. A significant suppression of the superfluid density with magnetic field rhos(H) is observed for both underdoped (x=0.125) and overdoped (x=0.17) samples. We show that the existing theoretical models of the Josephson vortex state fail to consistently describe the observed effects and discuss possible reasons for the discrepancies.
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