title: Towards a two-dimensional superconducting state of La(2-x)Sr(x)CuO4 in a moderate external magnetic field.
abstract: 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.
authors.affiliation: Department of Physics, University of California, San Diego, La Jolla, California 92093, USA. aschafgans@physics.ucsd.edu
authors.forename: A A
authors.initials: AA
authors.lastname: Schafgans
authors.forename: A D
authors.initials: AD
authors.lastname: LaForge
authors.forename: S V
authors.initials: SV
authors.lastname: Dordevic
authors.forename: M M
authors.initials: MM
authors.lastname: Qazilbash
authors.forename: W J
authors.initials: WJ
authors.lastname: Padilla
authors.forename: K S
authors.initials: KS
authors.lastname: Burch
authors.forename: Z Q
authors.initials: ZQ
authors.lastname: Li
authors.forename: Seiki
authors.initials: S
authors.lastname: Komiya
authors.forename: Yoichi
authors.initials: Y
authors.lastname: Ando
authors.forename: D N
authors.initials: DN
authors.lastname: Basov