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

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arxiv 2104.01814 v2 pith:V5MUOHUO submitted 2021-04-05 cond-mat.mtrl-sci cond-mat.str-el

Mizuki Ohno , Masaki Uchida , Ryosuke Kurihara , Susumu Minami , Yusuke Nakazawa , Shin Sato , Markus Kriener , Motoaki Hirayama
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Atsushi Miyake Yasujiro Taguchi Ryotaro Arita Masashi Tokunaga Masashi Kawasaki
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classification cond-mat.mtrl-scicond-mat.str-el
keywords magneticsemimetaltopologicaleusbfilmsquantumtransportfurther
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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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