Towards a Two-Dimensional Superconducting State ofLa2−xSrxCuO4in a Moderate External Magnetic Field

A. A. Schafgans, A. D. LaForge, S. V. Dordevic, M. M. Qazilbash, W. J. Padilla, K. S. Burch, Z. Q. Li, Seiki Komiya, Yoichi Ando, D. N. Basov
2010 Physical Review Letters  
We report a novel aspect of the competition and coexistence between magnetism and superconductivity in the high-$T_{c}$ cuprate La$_{2-x}$Sr$_{x}$CuO$_{4}$ (La214). With a modest magnetic field applied $H \parallel c$-axis, we monitored the infrared signature of pair tunneling between the CuO$_2$ 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
more » ... act, in spite of enhanced magnetism in the planes.
doi:10.1103/physrevlett.104.157002 pmid:20482012 fatcat:dum5ggfzmngdnisqujhx6bykme