Model of a strongly correlated liquid

✍ Scribed by M.Ya Amusia; V.R Shaginyan

• Book ID: 104337649
• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 68 KB
• Volume: 259
• Category: Article
• ISSN: 0375-9601
• DOI: 10.1016/s0375-9601(99)00478-8

✦ Synopsis

A model of a strongly correlated electron liquid based on the fermion condensation is suggested. We suppose that the appearance of fermion condensation presents a boundary, separating the region of a strongly interacting electron liquid from the region of strongly correlated electron liquid. Thus, a strongly correlated electron liquid can be related to a new type of liquid separated from a strongly interacting one by the fermion condensation phase transition. We study superconductivity of a strongly correlated liquid within our model and show that under certain conditions the superconductivity vanishes at temperatures T ) T , with the superconducting gap being smoothly transformed into a pseudogap. As a result, the pseudogap c occupies only a part of the Fermi surface. The gapped area shrinks with increasing temperature and vanishes at T s T ) , Ž . while the single particle excitations have a width g ; T y T .