Quantum transport observed in films of the magnetic topological semimetal EuSb2
Quantum transport observed in films of the magnetic topological semimetal EuSb2
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DOI：
10.1103/physrevb.103.165144
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发表时间：
2021-04
影响因子：
3.7
通讯作者：
M. Ohno;M. Uchida;R. Kurihara;S. Minami;Y. Nakazawa;Shin Sato;M. Kriener;M. Hirayama;A. Miyake;Y. Taguchi;R. Arita;M. Tokunaga;M. Kawasaki
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文献类型：
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作者：
M. Ohno;M. Uchida;R. Kurihara;S. Minami;Y. Nakazawa;Shin Sato;M. Kriener;M. Hirayama;A. Miyake;Y. Taguchi;R. Arita;M. Tokunaga;M. Kawasaki
我们报告了 EuSb$_2$ 单晶薄膜的制造及其量子传输的研究。第一性原理计算表明，EuSb$_2$ 是一种受非对称性保护的磁拓扑节线半金属。观察到的具有多个频率分量的舒布尼科夫-德哈斯振荡即使在 250 nm 厚的薄膜中也表现出较小的有效质量和二维场角依赖性，进一步表明表面态的可能贡献。高迁移率磁性拓扑半金属的这一发现将通过控制拓扑半金属薄膜中的磁序引发对奇异量子输运现象的进一步研究。
We report fabrication of EuSb$_2$ single-crystalline films and investigation of their quantum transport. First-principles calculations demonstrate that EuSb$_2$ is a magnetic topological nodal-line semimetal protected by nonsymmorphic symmetry. Observed Shubnikov-de Haas oscillations with multiple frequency components exhibit small effective masses and two-dimensional field-angle dependence even in a 250 nm thick film, further suggesting possible contributions of surface states. This finding of the high-mobility magnetic topological semimetal will trigger further investigation of exotic quantum transport phenomena by controlling magnetic order in topological semimetal films.