Types of superconductors

superconductors is divided to two types depending on it's temperature:

1- Low temperature superconductors(LTC): it is called also conventional superconductors such as Mercury and this type characterized by low critical temperature(Tc).

2- High temperature superconductors(HTS):this type characterized by high critical temperature(Tc).for example,(La2 Ba1 Cu O4)

kondo effect and kondo lattice

Kondo effect is one of the most significant feature of heave fermion material. It is basiclly , as I said in my presentation, the increasing of resistivity which caused by the interaction between the spin of conduction electron and the spin of impurity.At zero temperature, the spin of conduction electron will make asinglit with the spin of impurity .So, the resistivity p is propotional to log (Tf/T) and in real system the resistivity will be finite.
Kondo lattice appears when we have more impurities in the system and hence the intraction between impurites is taken into account as well as the intraction between conduction electron with impurity to calculate the resistivity.Actually, now kondo effect depend on the spin of impurities (ferromagnet or antiferromagnet)and the strength btween them.

Course evaluation and optional tute

I forgot to get you to fill out the course evaluation. Sorry.
Could we do that at 1pm today in the interaction room as part of the optional tutorial?
Those who come I will make it worthwhile....

Guide for assessable presentations:

Just a useful guide for assessable presentations.
http://sydney.edu.au/health_sciences/pdfs_docs/assign_guide.pdf

Good luck all with your presentations.

Superconductivity

A pdf that includes all main points about superconductivity and their magnetic property :

http://www.imprs-am.mpg.de/summerschool2003/muramatsu_notes.pdf

Student presentations

I expect you all to attend all the presentations and to fill out the feedback and assessment forms I will provide.

I will bring the data projector but it is your responsibility to bring a laptop and to check beforehand that you can get it to work with the data projector. I will set up the data projector at least 15 minutes before class time so you can do that.

Time limits will be strictly enforced.

Pseudogap phase

At the pseudogap phase there are still conductors with different properties of the usual conductors such as, linear resistivity. Pseudogap state has some similar properties with the superconducting state, but at a very high doping and temperature they act like normal Fermi-liquid.