Metal-insulator transitions are accompanied by huge resistivity changes, even over tens of
orders of magnitude, and are widely observed in condensed-matter systems. This article …

Since the first days of high-T c superconductivity, the materials science and the physics of
grain boundaries in superconducting compounds have developed into fascinating fields of …

Understanding the electron pairing in hole-doped cuprate superconductors has been a
challenge, in particular because the “normal” state from which it evolves is unprecedented …

The electrical properties and defect structure of selected compositions in the SrTi1−
xFexO3− y system (x= 0–0.8) have been studied using van der Pauw 4-point conductivity …

A theoretical review is given on high temperature superconductivity in copper oxides
(cuprates) by focusing on the hole do** cases based on the view that it is realized in …

Bulk-sensitive, polarization-dependent oxygen K-and copper L-edge absorption spectra of
single-domain La 2− x Sr x CuO 4 with CuO 2 planes tilted off the sample surface were …

Neutron scattering experiments continue to improve our knowledge of spin fluctuations in
layered cuprates, excitations that are symptomatic of the electronic correlations underlying …

The electric-field gradients (EFG's) of YBa 2 Cu 3 O 7, YBa 2 Cu 3 O 6.5, and YBa 2 Cu 3 O
6 are calculated on a first-principles basis using the full-potential linear augmented-plane …

We have developed a constrained-occupation local-density-functional technique to
calculate individual model Hamiltonian parameters for states of arbitrary localization. The …

Optical and Raman-scattering studies of a-, b-, and c-axis YBa 2 Cu 3 O 6+ x between 0.025
and 5.5 eV are presented as a function of do**, and compared to the results of Bi 2 Sr 2 …