Quantum corrections of the Dzyaloshinskii-Moriya interaction on the spin- $\frac{1}{2}$ AF-Heisenberg chain in an uniform magnetic field

S. Mahdavifar (), M. R. Soltani and A. A. Masoudi

The European Physical Journal B: Condensed Matter and Complex Systems, 2008, vol. 62, issue 2, 215-220

Abstract: We have investigated the ground state phase diagram of the 1D AF spin- $\frac{1}{2}$ Heisenberg model with the staggered Dzyaloshinskii-Moriya (DM) interaction in an external uniform magnetic field H. We have used the exact diagonalization technique. In the absence of the uniform magnetic field (H=0), we have shown that the DM interaction induces a staggered chiral phase. The staggered chiral phase remains stable even in the presence of the uniform magnetic field. We have identified that the ground state phase diagram consists of four Luttinger liquid, staggered chiral, spin-flop, and ferromagnetic phases. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2008

Keywords: 75.10.Jm Quantized spin models; 75.10.Pq Spin chain models (search for similar items in EconPapers)
Date: 2008
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DOI: 10.1140/epjb/e2008-00141-x

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