Recent content by nicola_gao

I am now constructing a crystal of theoretically finite size. Can I understand as that, for a triangular lattice, the positions of k points exactly form a "triangular lattice" too in the 1st BZ? Thanks a lot!

As it's said, the number of k point in a first Brillouin zone is determined by the number of lattice sites. For exmaple, a 2-d n by m square lattice, its 1st BZ contains m by n k values and I assume these k values are equally separated. My question is that how the layout of k point in the 1st...

Thanks a lot! very helpful. but they seem all experiments, any idea about the theory side, RVB, phonons, etc, etc?

Hi, I've been working at a project on hign Tc superconductivity for a while. However, I found myself really need to gain some idea about the larger scope of this field. :confused: Could anyone here recommend an article or a book that has a general summary for High Tc superconductivity...

The Density of States diagram gives gaps sometime. As I know, if the band is filled up to the gap, then the material is an insulator. However, it seems to me, that superconductors also open a gap in their density of states diagram, as BCS theory says. If my understanding is correct, I am a...