Spin gap in a quasi-1D S=1/2 antiferromagnet K2CuSO4Cl2
| Autor: | Soldatov, T. A., Smirnov, A. I., Povarov, K. Yu., Hälg, M., Lorenz, W. E. A., Zheludev, A. |
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| Rok vydání: | 2018 |
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| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.98.144440 |
| Popis: | Electron spin resonance experiments in the quasi-1D S=1/2 antiferromagnet K$_2$CuSO$_4$Cl$_2$ reveal opening of a gap in absence of magnetic ordering, as well as an anisotropic shift of the resonance magnetic field. These features of magnetic excitation spectrum are explained by a crossover between a gapped spinon-type doublet ESR formed in a 1D antiferromagnet with uniform Dzyaloshinskii-Moriya interaction and a Larmor-type resonance of a quasi-1D Heisenberg system Comment: 9 pages, 12 figures |
| Databáze: | arXiv |
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