Department of Physics, University of California, San Diego, La Jolla, California 92093, USA.
Phys Rev Lett. 2010 Apr 16;104(15):157002. doi: 10.1103/PhysRevLett.104.157002.
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.
我们报告了高温超导 cuprate La(2-x)Sr(x)CuO4 (La214) 中磁性和超导共存竞争的一个新方面。在沿 c 轴施加适度磁场 H 的情况下，我们监测了 CuO2 平面之间对隧穿的红外特征，并在一系列欠掺杂 La214 单晶体中发现了层间耦合的完全抑制。我们发现，尽管平面内磁性增强，但面内超导性能仍然完好无损。
