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EQUATION-OF-MOTION APPROACH TO THE HUBBARD-MODEL IN INFINITE DIMENSIONS
GROS C, WENZEL W, VALENTI R, STOLZE J
JOURNAL OF LOW TEMPERATURE PHYSICS
99 (3-4): 603-605 MAY 1995

Document type: Article    Language: English    Cited References: 14    Times Cited: 0   

Abstract:
We consider the Hubbard model on the Bethe lattice with infinite Coordination number and construct (i) a systematic series of self-consistent approximations to the one-particle Green's function, G((n))(omega), n = 2,3,... and (ii) conduct an exact diagonalization study of the Hubbard star and the star of the stars. We present analytic and numerical results for the Mott-Hubbard transition at half filling. We find consistently (i) a Critical U-c similar to 2.5 and (ii) that the gap opens like similar to (U - U-c)(3/2).

KeyWords Plus:
MOTT TRANSITION

Addresses:
GROS C, UNIV DORTMUND,DEPT PHYS,D-44221 DORTMUND,GERMANY

Publisher:
PLENUM PUBL CORP, NEW YORK

IDS Number:
QX877

ISSN:
0022-2291


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