Spiral states in the square-lattice hubbard model

Sarker, Sanjoy ; Jayaprakash, C. ; Krishnamurthy, H. R. ; Wenzel, Wolfgang (1991) Spiral states in the square-lattice hubbard model Physical Review B, 43 (10). pp. 8775-8778. ISSN 0163-1829

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Official URL: http://prb.aps.org/abstract/PRB/v43/i10/p8775_1

Related URL: http://dx.doi.org/10.1103/PhysRevB.43.8775


We present a variety of physical implications of a mean-field theory for spiral spin-density-wave states in the square-lattice Hubbard model for small deviations from half filling. The phase diagram with the paramagnetic metal, two spiral (semimetallic) states, and ferromagnet is calculated. The momentum distribution function and the (quasiparticle) density of states are discussed. There is a significant broadening of the quasiparticle bands when the antiferromagnetic insulator is doped. The evolution of the Fermi surface and the variation of the plasma frequency and a charge-stiffness constant with U/t and δ are calculated. The connection to results based on the Schwinger-boson-slave-fermion formalism is made.

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Source:Copyright of this article belongs to American Physical Society.
ID Code:17532
Deposited On:16 Nov 2010 09:37
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