Effective mass divergence in the infinite-U Hubbard model

2006 ◽  
Vol 378-380 ◽  
pp. 323-324 ◽  
Author(s):  
Takashi Koretsune ◽  
Masao Ogata



2004 ◽  
Vol 320 (5-6) ◽  
pp. 459-464 ◽  
Author(s):  
M.Ya. Amusia ◽  
A.Z. Msezane ◽  
V.R. Shaginyan


1996 ◽  
Vol 10 (27) ◽  
pp. 3717-3725 ◽  
Author(s):  
JIAN PING LU

The details of the Generalized-Gutzwiller-Approximation in degenerate Hubbard models are presented. It is found that the metal-insulator transition occurs at a finite correlation Uc when the average number of electrons per lattice site is an integer. A derivation is given for the general expression of Uc(x, N) which reproduces all previously known Gutzwiller solutions, including that of the boson Hubbard model. The Uc depends sensitively on both the band degeneracy N and the filling x. Effects of the lattice structure on the metal-insulator transition and the effective mass are discussed.



1988 ◽  
Vol 49 (C8) ◽  
pp. C8-49-C8-50
Author(s):  
M. D. Coutinho-Filho




2011 ◽  
Vol 35 (1) ◽  
pp. 15-27
Author(s):  
Zoran Ivić ◽  
Željko Pržulj

Adiabatic large polarons in anisotropic molecular crystals We study the large polaron whose motion is confined to a single chain in a system composed of the collection of parallel molecular chains embedded in threedimensional lattice. It is found that the interchain coupling has a significant impact on the large polaron characteristics. In particular, its radius is quite larger while its effective mass is considerably lighter than that estimated within the one-dimensional models. We believe that our findings should be taken into account for the proper understanding of the possible role of large polarons in the charge and energy transfer in quasi-one-dimensional substances.





1988 ◽  
Vol 24 (1) ◽  
pp. 64-65 ◽  
Author(s):  
A. Aishima ◽  
Y. Fukushima
Keyword(s):  


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