Short-range order effects in single-crystalline EuIn2P2

Short-range order effects in single-crystalline EuIn₂P₂

T. Toliński, Q.U. Ain, K. Synoradzki, A. Łapiński, S. Zięba

Institute of Molecular Physics, Polish Academy of Sciences, Poznań, Poland

T. Romanova, K. Singh, O. Pavlosiuk, P. Wiśniewski, D. Kaczorowski

Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Wrocław, Poland

EuIn₂P₂ is a fascinating Zintl-type material, because theoretical calculations suggest that it can be a ferromagnetic Weyl semimetal with Weyl points when the magnetic moments are oriented along the a axis or it can exhibit a Weyl nodal line when the moments are along the c axis [1]. However, in our recent studies we focused on the transport properties of EuIn₂P₂ in the temperature range indicated in the Figure. In this region, a large negative magnetoresistance (NMR) is observed. The electrical resistivity of EuIn₂P₂ was measured for a current applied within the ab plane and increasing values of the magnetic field applied along the c axis. The behavior above T_C = 24 K is similar to the case of EuIn₂As₂ [2]. In the present study, evidence was provided that indicates towards short-range magnetic interactions and the variable-range hopping mechanism. This is supported by characteristic NMR dependences on the magnetic field strength and the scaled magnetization as well as by distinct changes observed in Raman spectroscopy.

 Phys. Rev. 110, 174425 (2024); https://link.aps.org/doi/10.1103/PhysRevB.110.174425

 

 

References:

[1] A. B. Sarkar et al., Phys. Rev. Mater. 6, 044204 (2022).

[2] T. Toliński and D. Kaczorowski, SciPost Phys. Proc. 11, 005 (2023).