Pseudogap in High Temperature Superconductors Investigated by High-Field Interlayer Transport(Current Topic)

Abstract

Owing to its intrinsic tunneling nature, the interlayer transport in highly anisotropic high-temperature superconductors can probe changes in the density of states near the Fermi energy in the CuO_2 planes. Measurements using a 60 T pulsed magnet, we find a predominant role of spin-singlet correlations in the formation of the anomalous "pseudogap" in both electron- and hole-doped cuprates.