Transport properties of hole and electron - doped high temperature superconductors studied in ultra-high pulsed magnetic fields.

The study of correlated systems, and especially the nature of high temperature superconductivity (HTSC) remains a very important problem in modern condensed matter physics. High precision measurements of the transport properties (magneto-resistance and Hall effect) give essential information about the nature of the HTSC. Due to the relatively high critical temperature of these materials, also the critical magnetic fields are very high. In particular, fields up to 50-70 tesla are needed to suppress superconductivity and to allow the study of the underlying normal state. Only these high magnetic fields allow the complete study of the HTSC materials throughout the entire Field-Temperature phase diagram. Within our collaboration, we will produce HTSC materials at the K.U.Leuven (hole doped) and at the IoP-Beijing (electron doped). Both materials, essentially different in the nature of the charge carrier, will be studied in high magnetic fields, first at the K.U.Leuven, and later on at the new Chinese National Pulsed Field Laboratory (PHMFF - Wuhan). This will also allow young students to be trained in this rather complicated measurement technique, and will also strengthen the bond between the K.U.Leuven and the Chinese partners, as well as among the Chinese partners.

Keywords:High temperature superconductors, Correlated systems, High Pulsed Magnetic Fields, Phase diagram, Nature of superconductivity

Disciplines:Condensed matter physics and nanophysics