Ferromagnetism in the Hubbard model with an infinite-range hopping

被引：16
作者：
Pieri, P [1 ]
机构：
[1] UNIV BOLOGNA,IST NAZL FIS NUCL,I-40126 BOLOGNA,ITALY
来源：
MODERN PHYSICS LETTERS B | 1996年 / 10卷 / 26期
关键词：
D O I：
10.1142/S0217984996001449
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We prove, as recently conjectured, that the ground state of the Hubbard Hamiltonian with an infinite-range hopping, when the number of electrons N-e = N + 1 (M being the number of sites), is ferromagnetic fully polarized. This turns out to be a simple consequence of a general theorem proven by Mielke on flat-band ferromagnetism.
引用
收藏
页码：1277 / 1281
页数：5
相关论文
共 18 条
[11]   The Hubbard model on a complete graph: Exact analytical results [J].
Salerno, M .
ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1996, 99 (04) :469-471
[12]  
SALERNO M, 1996, IN PRESS Z PHYS B
[13]   FERROMAGNETISM IN HUBBARD MODELS [J].
TASAKI, H .
PHYSICAL REVIEW LETTERS, 1995, 75 (25) :4678-4681
[14]   FERROMAGNETISM IN THE HUBBARD MODELS WITH DEGENERATE SINGLE-ELECTRON GROUND-STATES [J].
TASAKI, H .
PHYSICAL REVIEW LETTERS, 1992, 69 (10) :1608-1611
[15]   EXTENSION OF NAGAOKA THEOREM ON THE LARGE-U HUBBARD-MODEL [J].
TASAKI, H .
PHYSICAL REVIEW B, 1989, 40 (13) :9192-9193
[16]   EXACT SOLUTION AND THERMODYNAMICS OF THE HUBBARD-MODEL WITH INFINITE-RANGE HOPPING [J].
VANDONGEN, P ;
VOLLHARDT, D .
PHYSICAL REVIEW B, 1989, 40 (10) :7252-7255
[17]   GROUND-STATE OF THE U=INFINITY HUBBARD-MODEL WITH INFINITE-RANGE HOPPING [J].
VERGES, JA ;
GUINEA, F ;
GALAN, J ;
VANDONGEN, PGJ ;
CHIAPPE, G ;
LOUIS, E .
PHYSICAL REVIEW B, 1994, 49 (21) :15400-15403
[18]  
WANG DF, CONDMAT9604121
12