Interplay between spatial anisotropy and next-nearest-neighbor exchange interactions in the triangular Heisenberg model
- Gonzalez, Matías Gabriel
- Ghioldi, Esteban Agustín
- Gazza, Claudio Javier
- Manuel, Luis Oscar
- Trumper, Adolfo Emilio
DOIAbstract
We investigate the interplay between spatial anisotropy and further exchange interactions in the spin-12Heisenberg antiferromagnetic model on a triangular lattice. We use the Schwinger boson theory by including Gaussian fluctuations above the mean-field approach. The phase diagram exhibits a strong reduction of the long-range collinear and incommensurate spiral regions with respect to the mean-field ones. This reduction is accompanied by the emergence of its short-range order counterparts, leaving an ample room for zero-flux and nematic spin-liquid regions. Remarkably, within the neighborhood of the spatially isotropic line, there is a range where the spirals are so fragile that only the commensurate 120◦Néel ones survive. The good agreemen...
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