Different effects connected with the change of the electronic chemical potential at phase transitions in solids are reviewed. It is shown that this chemical potential may have a kink at a 2nd-order phase transition. When a system contains two electronic subsystems, one undergoing transition, another remaining normal, there should be charge redistribution between these subsystems below T-c. Such charge redistribution (e.g., between planes and chains in YBCO) may explain many anomalies observed in high-T-c superconductors and in other systems. One extra consequence of this effect may be charging of the vortex cores in type II superconductors; this may explain the negative anomaly in the Hall effect, often observed experimentally in a mixed state.
|Pagina's (van-tot)||7 - 11|
|Tijdschrift||Journal of Superconductivity|
|Nummer van het tijdschrift||1|
|Status||Published - feb-1996|