Baza Publikacji Pracowników Politechniki Lubelskiej

Status:
Autorzy:	Litak Grzegorz, Györffy Balazs L.
Rok wydania:	2000
Wersja dokumentu:	Drukowana \| Elektroniczna
Język:	angielski
Numer czasopisma:	10
Wolumen/Tom:	62
Strony:	6629 - 6637
Impact Factor:	3,065
Web of Science® Times Cited:	26
Scopus® Cytowania:	28
Bazy:	Web of Science \| Scopus
Efekt badań statutowych	NIE
Materiał konferencyjny:	NIE
Publikacja OA:	NIE
Abstrakty:	angielski
	In the case of superconductors whose electrons attract each other only if they are near certain centers, the question arises of how many such centers are needed to make the ground state superconducting? We shall examine it in the context of a random U Hubbard model. In short, we study the case where Ui is −\|U\| and 0 with probability c and 1−c, respectively, on a lattice whose sites are labeled i using the Gorkov decoupling and the coherent potential approximation. We argue that for this model there is a critical concentration c0 below which the system is not a superconductor.

Random negative-U Hubbrad model