Enhanced current transport at grain boundaries in high-T(sub c) superconductors

Article Abstract:

Calculations, imaging and spectroscopy is reported at the atomic scale that demonstrate that in poly-crystalline YBCO, highly strained grain-boundary regions contain excess O vacancies, which reduce the local hole concentration. The results indicate that the ionic radii are more important than their electronic valences for enhancing current density.

United States, Polycrystalline semiconductors, Ionic crystals

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Superconductivity in two-dimensional CoO2 layers

Article Abstract:

Materials scientists have identified a new superconducting material consisting of two-dimensional copper oxide layers separated by layers of Na+ ions and water molecules.

Analysis, Electric properties, Materials science, Copper oxide, Copper oxides

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A distinct bosonic mode in an electron-doped high-transition-temperature superconductor

Article Abstract:

Several measurements are carried out to explain the distinct bosonic mode of energies present in an electron-doped high-transition-temperature superconductor.

Technology application, Scanning tunneling microscopy, Bosons

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