Electronic structure and physical properties of EuAuAs single crystal

Malick, S. and Singh, J. and Laha, A. and Kanchana, V. and et al, . (2022) Electronic structure and physical properties of EuAuAs single crystal. Physical Review B, 105 (4). pp. 1-7. ISSN 2469-9950

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Abstract

High-quality single crystals of EuAuAs were studied by means of powder X-ray diffraction, magnetization, magnetic susceptibility, heat capacity, electrical resistivity and magnetoresistance measurements. The compound crystallizes with a hexagonal structure of the ZrSiBe type (space group P63/mmc). It orders antiferromagnetically below 6 K due to the magnetic moments of divalent Eu ions. The electrical resistivity exhibits metallic behavior down to 40 K, followed by a sharp increase at low temperatures. The magnetotransport isotherms show a distinct metamagneticlike transition in concert with the magnetization data. The antiferromagnetic ground state in EuAuAs was corroborated in the ab initio electronic band structure calculations. Most remarkably, the calculations revealed the presence of nodal line without spin-orbit coupling and Dirac point with inclusion of spin-orbit coupling. The Z2 invariants under the effective time reversal and inversion symmetries make this system nontrivial topological material. Our findings, combined with experimental analysis, makes EuAuAs a plausible candidate for an antiferromagnetic topological nodal-line semimetal. © 2022 American Physical Society.

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IITH Creators:

IITH Creators	ORCiD
Kanchana, V.	UNSPECIFIED

Item Type:

Article

Additional Information:

We thank D. Ram for his assistance with the crystal growth. Financial support from the Science and Engineering Research Board (India) and the Department of Science and Technology (India) are acknowledged. V.K. acknowledges IIT Hyderabad for its computational facility. J.S. was supported through CSIR scholarship. Z.H. acknowledges financial support from the Polish National Agency for Academic Exchange under a Ulam fellowship.

Uncontrolled Keywords:

Divalents; Electrical resistivity measurements; Electronic.structure; Hexagonal structures; High quality single crystals; Magnetoresistance measurements; Nodal line; Space Groups; Spin-orbit couplings; Structure and physical properties

Subjects:

Physics
Physics > Electricity and electronics

Divisions:

Department of Physics

Depositing User:

. LibTrainee 2021

Date Deposited:

15 Jul 2022 04:47

Last Modified:

15 Jul 2022 04:47

URI:

http://raiithold.iith.ac.in/id/eprint/9715