Regensburg 2022 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 20: Topology: Poster Session
TT 20.7: Poster
Mittwoch, 7. September 2022, 15:00–18:00, P1
Search for new europium-based intermetallic 122 materials with non-trivial topological properties — •Sarah Krebber, Kristin Kliemt, Cornelius Krellner, and Asmaa El Mard — Max-von-Laue Straße 1, 60438 Frankfurt am Main, Physikalisches Institut
Today, more and more Eu-based compounds come into focus of magnetic topological nontrivial materials. The first examples were thin films of EuS on Bi2Se3 [1]. In recent studies, the material EuCd2As2 has attracted a lot of attention due to emergence of a variety of topological phases and magnetic phenomena [2,3]. Recently, a spin fluctuation induced Weyl semimetal state in the paramagnetic phase of EuCd2As2 [2] and its tunability by pressure [4] was discovered. Furthermore, the similar material EuCd2P2 has been explored due to its strong colossal magnetoresistance effect [5]. In this work we present the single crystal growth and characterization of the related system EuT2X2, with T = Cd, Zn, Mn and X = P, crystallizing in the same trigonal structure (P-3m1) in order to search for similar effects in these materials. The physical properties of the compounds are explored via magnetization, electrical transport and heat capacity.
[1] Katmis et al., Nature 533, 513 (2016)
[2] Ma et al., Science Adv. 5, eaaw4718 (2019)
[3] Jo et al., Phys. Rev. B 101, 140402(R) (2020)
[4] Gati et al., Phys. Rev. B 104, 155124 (2021)
[5] Wang et al., Adv.Mater. 33, 2005755 (2021)