论文标题
带有磁性的磁混合瓦伦特半分euznsb $ _2 $带有乐队结构中的狄拉克状态
Magnetic mixed valent semimetal EuZnSb$_2$ with Dirac states in the band structure
论文作者
论文摘要
我们报告以单晶的形式获得并研究了新的抗磁性半磁性Euznsb $ _2 $。电阻率，磁化能力和热容量指示EU的抗铁磁顺序，$ t_n $ = 20 K. EU $^{2+}的有效力矩从磁化化和特定的热量测量中推断为3.5 $μ_b$，比EU $ $ $ $^{2+} $的理论价值小，并且小于EU $^$ $ $^$ $^$ $^$^3+}欧盟$^{2+} $。磁场依赖性电阻率测量表明主要的准二维费米表面，而第一原则计算则指向存在狄拉克费米子的存在。因此，EUZNSB $ _2 $可以代表第一个研究动态电荷波动的相互作用，局部磁性4 $ f $矩和具有SB轨道特征的Dirac状态的平台。
We report discovery of new antiferromagnetic semimetal EuZnSb$_2$, obtained and studied in the form of single crystals. Electric resistivity, magnetic susceptibility and heat capacity indicate antiferromagnetic order of Eu with $T_N$ = 20 K. The effective moment of Eu$^{2+}$ inferred from the magnetization and specific heat measurement is 3.5 $μ_B$, smaller than the theoretical value of Eu$^{2+}$ due to presence of both Eu$^{3+}$ and Eu$^{2+}$. Magnetic field-dependent resistivity measurements suggest dominant quasi two dimensional Fermi surfaces whereas the first-principle calculations point to the presence of Dirac fermions. Therefore, EuZnSb$_2$ could represent the first platform to study the interplay of dynamical charge fluctuations, localized magnetic 4$f$ moments and Dirac states with Sb orbital character.
