We solve analytically the N×N square lattice Hubbard model for even N at half-filling and weak coupling by a new approach. The exact ground-state wave function provides an intriguing and appealing picture of the antiferromagnetic order. Like at strong coupling, the ground state has total momentum Ktot=(0,0) and transforms as an s wave for even N/2 and as a d wave otherwise.

Cini, M., Stefanucci, G. (2001). Exact ground state of the two-dimensional Hubbard model at half-filling for U=0(+). SOLID STATE COMMUNICATIONS, 117(8), 451-454 [10.1016/S0038-1098(00)00504-4].

Exact ground state of the two-dimensional Hubbard model at half-filling for U=0(+)

CINI, MICHELE;STEFANUCCI, GIANLUCA
2001-01-01

Abstract

We solve analytically the N×N square lattice Hubbard model for even N at half-filling and weak coupling by a new approach. The exact ground-state wave function provides an intriguing and appealing picture of the antiferromagnetic order. Like at strong coupling, the ground state has total momentum Ktot=(0,0) and transforms as an s wave for even N/2 and as a d wave otherwise.
2001
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore FIS/03 - FISICA DELLA MATERIA
English
Con Impact Factor ISI
Cini, M., Stefanucci, G. (2001). Exact ground state of the two-dimensional Hubbard model at half-filling for U=0(+). SOLID STATE COMMUNICATIONS, 117(8), 451-454 [10.1016/S0038-1098(00)00504-4].
Cini, M; Stefanucci, G
Articolo su rivista
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/97075
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