Functional-integral approach to the investigation of the spin-spiral magnetic order and phase separation

2011/09/09 by Anatoly Arzhnikov, Arzhnikov, Anatoly, Andrey Groshev +1
Physics and Astronomy · #FOS: Physical sciences #Strongly Correlated Electrons (cond-mat.str-el) #cond-mat.str-el

paper · pdf · doi:10.48550/arxiv.1109.2037

5 pages, 3 figures

arxiv created 2011/10/21 · arxiv updated 2011/10/24

Abstract

We investigate a two-dimensional single-band Hubbard model with a nearest-neighbor hopping. We treat a commensurate collinear order as well as incommensurate spiral magnetic phases at a finite temperature using a Hubbard-Stratonovich transformation with a two-field representation and solve this problem in a static approximation. We argue that temperature dramatically influence the collinear and spiral magnetic phases, phase separation in the vicinity of half-filling. The results imply a possible interpretation of unusual behavior of magnetic properties of single-layer cuprates.

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