论文标题
磁性Weyl半准CO3SN2S2中的弱抗钙化和铁磁性
Weak antilocalization and ferromagnetism in magnetic Weyl semimetal Co3Sn2S2
论文作者
论文摘要
在这里，我们报告了成功合成单晶磁性Weyl半分CO3SN2S2。合成的晶体通过各种工具进行表征。 X射线衍射，场发射电子显微镜和X射线光电子光谱。在175K左右的磁化和热容量中观察到清晰的铁磁过渡，通过电气传输测量进一步验证。在冷却和变暖周期中，在R-T测量中观察到滞后，显示了合成样品中一阶相变和电荷顺序的存在。合成的CO3SN2S2在2K时表现出高约230％的高磁磁性。合成的CO3SN2S2中的转运现象似乎在低于70 K的低温下从拓扑表面状态下有贡献，而高于该状态，发现同样的是强烈依赖其块状磁态。磁性数据的磁导率数据最高到负1T（特斯拉）配备了Hikami Larkin Nagaoka模型，该模型显示在低于30K的低温下合成的CO3SN2S2晶体中存在弱抗钙化作用。
Here we report successful synthesis of single crystalline magnetic Weyl semimetal Co3Sn2S2. The synthesized crystal is characterized through various tools viz. X-ray diffraction, field emission electron microscopy and X-ray photoelectron spectroscopy. A clear ferromagnetic transition is observed in magnetization and heat capacity at around 175K, which is further verified through electrical transport measurements. Hysteresis is observed in R-T measurements in cooling and warming cycle, showing the presence of first order phase transition and charge ordering in the synthesized sample. The synthesized Co3Sn2S2 exhibits high magnetoresistance of around 230% at 2K. The transport phenomenon in synthesized Co3Sn2S2 appears to have contributions from topological surface states at low temperature below say 70 K, and above that the same is found to be strongly dependent on its bulk magnetic state. Magnetoconductivity data at low fields of up to plus minus 1T (Tesla) is fitted with Hikami Larkin Nagaoka model, which shows the presence of weak antilocalization effect in synthesized Co3Sn2S2 crystal at low temperatures below 30K.
