Towards a two-dimensional superconducting state of La2-xSrxCuO2 in a moderate external magnetic field
Abstract
We report a novel aspect of the competition and coexistence between magnetism and superconductivity in the high-Tc cuprate La2-xSrxCuO4 (La214). With a modest magnetic field applied H c-axis, we monitored the infrared signature of pair tunneling between the CuO2 planes and discovered the complete suppression of interlayer coupling in a series of underdoped La214 single crystals. We find that the in-plane superconducting properties remain intact, in spite of enhanced magnetism in the planes.
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