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arXiv · 2104.01814

Quantum transport observed in films of magnetic topological semimetal EuSb$_2$

Mizuki Ohno·Masaki Uchida·Ryosuke Kurihara·Susumu Minami·Yusuke Nakazawa·Shin Sato·Markus Kriener·Motoaki Hirayama·Atsushi Miyake·Yasujiro Taguchi·Ryotaro Arita·Masashi Tokunaga·Masashi Kawasaki
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Abstract

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.

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Mizuki Ohno, Masaki Uchida, Ryosuke Kurihara, Susumu Minami, Yusuke Nakazawa, Shin Sato, Markus Kriener, Motoaki Hirayama, Atsushi Miyake, Yasujiro Taguchi, Ryotaro Arita, Masashi Tokunaga, Masashi Kawasaki. 2021-04-05. Quantum transport observed in films of magnetic topological semimetal EuSb$_2$. https://doi.org/10.1103/physrevb.103.165144

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