Towards a two-dimensional superconducting state of La(2-x)Sr(x)CuO4 in a moderate external magnetic field.
We report a novel aspect of the competition and coexistence between magnetism and superconductivity in the high-T(c) cuprate La(2-x)Sr(x)CuO4 (La214). With a modest magnetic field applied H parallel 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.
Schafgans
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Department of Physics, University of California, San Diego, La Jolla, California 92093, USA. aschafgans@physics.ucsd.edu
LaForge
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Dordevic
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Qazilbash
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Padilla
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Burch
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Li
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Komiya
Seiki
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Ando
Yoichi
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Basov
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