Sanjoy, Sarker and Jayaprakash, C and Krishnamurthy, HR and Wolfgang, Wenzel (1991) Spiral states in the square-lattice Hubbard model. In: Physical Review B: Condensed Matter, 43 (10). pp. 8775-8778.
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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.
|Item Type:||Editorials/Short Communications|
|Additional Information:||Copyright of this article belongs to The American Physical Society.|
|Keywords:||Quantized spin models.|
|Department/Centre:||Division of Physical & Mathematical Sciences > Physics|
|Date Deposited:||30 Nov 2010 10:58|
|Last Modified:||30 Nov 2010 10:58|
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