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Spiral states in the square-lattice Hubbard model

Sanjoy Sarker, C. Jayaprakash, H. R. Krishnamurthy, and Wolfgang Wenzel
Phys. Rev. B 43, 8775(R) – Published 1 April 1991
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Abstract

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.

  • Received 27 September 1990

DOI:https://doi.org/10.1103/PhysRevB.43.8775

©1991 American Physical Society

Authors & Affiliations

Sanjoy Sarker

  • Department of Physics and Astronomy, University of Alabama, Tuscaloosa, Alabama 35487

C. Jayaprakash

  • Department of Physics, The Ohio State University, Columbus, Ohio 43210

H. R. Krishnamurthy

  • Department of Physics, Indian Institute of Science, Bangalore 560 012 India

Wolfgang Wenzel

  • Department of Physics, The Ohio State University, Columbus, Ohio 43210

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Issue

Vol. 43, Iss. 10 — 1 April 1991

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