Kim, EH and Sólyom, Jenő (1999) Opening of the Haldane gap in anisotropic two- And four-leg spin ladders. PHYSICAL REVIEW B, 60 (22). pp. 15230-15244. ISSN 2469-9950
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Abstract
We study the opening of the Haldane gap in two-leg and four-leg anisotropic spin ladders using bosonization and renormalization group methods, and we determine the phase diagram as a function of the interchain coupling and relative anisotropy, J z /Jxy. It is found that the opening of the Haldane gap is qualitatively different for the two cases considered. For the two-leg ladder the Haldane gap opens for arbitrarily small interchain coupling, independent of J z /Jxy, and the Haldane phase exists in a large region of parameter space. For the four-leg ladder the opening of the Haldane gap is strongly dependent on both the interchain coupling as well as J z /Jxy, and the Haldane phase exists only in a narrow region about the isotropic antiferromagnet.
Item Type: | Article |
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Additional Information: | Export Date: 10 March 2023 |
Subjects: | Q Science / természettudomány > QC Physics / fizika |
SWORD Depositor: | MTMT SWORD |
Depositing User: | MTMT SWORD |
Date Deposited: | 25 Jan 2024 09:48 |
Last Modified: | 25 Jan 2024 09:48 |
URI: | http://real.mtak.hu/id/eprint/185919 |
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