For the usual doping process, within the resonable bonds we can say that the value of oxygen excess is not very well established, but the ambient highest Tc suggests optimal doping. Remember the GS of the generic phase diagram for the class of layered copper oxide SCs in ½ filled case: We are in the AF Mott insulator state first. We dope hole with small doses.
Which one of the following scenarios is physically true?
1. When the hole concentration started to increase gradually, this causes to create RVB pairs. In a certain value of doping the pair and hole concentration will balance between each other and we will have optimal doping value of intermediate regime.
2. The pairs already exist. When the holes are doped, this will destroys the pairs. In the corresponding doping value, again we will have an optima.
Afterwards, we will begin to loose holes and pairs balance, then a metallic Fermi liquid will occurs in overdoped regime.
Additionally; what is the actual charge carrier for High-Tc SCs? Doublons, holes or pairs?
Very briefly, for orientation you may wish to consult the article Who or what is RVB?, by PW Anderson (Physics Today, pp. 8-9, April 2008) - link attached below. The two references cited in this article (by Anderson, and Fazekas and Anderson) are most relevant.
http://dx.doi.org/10.1063/1.2911190
http://dx.doi.org/10.1063/1.2911190
Dear Behnam Farid, Thank you very much for your recommendations. Bests.
- Badges
- Science topic
- Similar topics
- Physics
- Condensed Matter Physics