期刊
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
卷 35, 期 25, 页码 -出版社
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0217979221502234
关键词
Bose-Einstein condensation of triplons; exchange and Dzyaloshinsky-Moriya anisotropy; energy dispersion
资金
- TUBITAK-BIDEB (2221)
- Ministry of Innovative Development of the Republic of Uzbekistan
- Science and Technological Council of Turkey (TUBITAK) [119N689]
- Turkish Academy of Sciences (TUBA) [AD21]
- Academy of Sciences of the Republic of Uzbekistan
In this study, the modification of low-temperature properties of quantum magnets was investigated using a mean-field-based approach, revealing the significant influence of Dzyaloshinsky-Moriya interaction on the physics. The anomalous density sign is changed by DM interaction, and the critical temperature of phase transition is positively shifted due to it. Additionally, the spectrum of low energy excitations shows a linear dispersion with a small anisotropy gap.
We study the modification of low-temperature properties of quantum magnets such as magnetization, heat capacity, energy spectrum and densities of condensed and noncondensed quasiparticles (triplons) due to anisotropies in the framework of mean-field- based approach. We show that in contrast to exchange anisotropy (EA) interaction, Dzyaloshinsky-Moriya (DM) interaction modifies the physics dramatically. Particularly, it changes the sign of the anomalous density in the whole range of temperatures. Its critical behavior is slightly modified also by the EA. We have found that the shift of the critical temperature of phase transition (or crossover caused by DM interaction) is positive and significant. Using the experimental data on the magnetization of the compound TlCuCl3, we have found optimal values for the strengths of EA and DM interactions. The spectrum of the energy of low lying excitations has also been investigated and found to develop a linear dispersion similar to Goldstone mode with a negligibly small anisotropy gap.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据