Emerging superconductivity hidden beneath charge-transfer insulators.

In many of today's most interesting materials, strong interactions prevail upon the magnetic moments, the electrons, and the crystal lattice, forming strong links between these different aspects of the system. Particularly, in two-dimensional cuprates, where copper is either five- or six-fold coordinated, superconductivity is commonly induced by chemical doping which is deemed to be mandatory by destruction of long-range antiferromagnetic order of 3d(9) Cu(2+) moments. Here we show that superconductivity can be induced in Pr2CuO4, where copper is four-fold coordinated.

Oxypnictide SmFeAs(O,F) superconductor: a candidate for high-field magnet applications.

The recently discovered oxypnictide superconductor SmFeAs(O,F) is the most attractive material among the Fe-based superconductors due to its highest transition temperature of 56 K and potential for high-field performance. In order to exploit this new material for superconducting applications, the knowledge and understanding of its electro-magnetic properties are needed. Recent success in fabricating epitaxial SmFeAs(O,F) thin films opens a great opportunity to explore their transport properties.

Factors relating to doctors' desire to change hospitals in Japan.

Purpose: This study seeks to investigate doctors' desire to change the hospital where they work to sustain higher quality care.

Design/methodology/approach: Self-administered questionnaires were sent to doctors in Aichi Prefecture, Japan. Data were analyzed using univariate and logistic regression analysis and recursive partitioning.