Interplay between Local Moment and Itinerant Magnetism in the Layered Metallic Antiferromagnet TaFe1.14Te3

Sae Young Han; Evan J Telford; Asish K Kundu; Sylvia J Bintrim; Simon Turkel; Ren A Wiscons; Amirali Zangiabadi; Eun-Sang Choi; Tai-De Li; Michael L Steigerwald; Timothy C Berkelbach; Abhay N Pasupathy; Cory R Dean; Colin Nuckolls; Xavier Roy

doi:10.1021/acs.nanolett.3c03112

Interplay between Local Moment and Itinerant Magnetism in the Layered Metallic Antiferromagnet TaFe_1.14Te₃

Nano Lett. 2023 Nov 22;23(22):10449-10457. doi: 10.1021/acs.nanolett.3c03112. Epub 2023 Nov 7.

Authors

Sae Young Han¹, Evan J Telford^{1

2}, Asish K Kundu³, Sylvia J Bintrim¹, Simon Turkel², Ren A Wiscons¹, Amirali Zangiabadi⁴, Eun-Sang Choi⁵, Tai-De Li^{6

7}, Michael L Steigerwald¹, Timothy C Berkelbach¹, Abhay N Pasupathy^{2

3}, Cory R Dean², Colin Nuckolls¹, Xavier Roy¹

Affiliations

¹ Department of Chemistry, Columbia University, 3000 Broadway, New York, New York 10027, United States.
² Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027, United States.
³ Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, PO Box 5000, Upton, New York 11973, United States.
⁴ Department of Applied Physics and Applied Mathematics, Columbia University, 500 W 120th St, New York, New York 10027, United States.
⁵ National High Magnetic Field Laboratory, 1800 E Paul Dirac Dr, Tallahassee, Florida 32310, United States.
⁶ Nanoscience Initiative at Advanced Science Research Center, Graduate Center of the City University of New York, 85 St. Nicholas Terrace, New York, New York 10031, United States.
⁷ Department of Physics, The City College of New York, 160 Convent Avenue, New York, New York 10031, United States.

PMID: 37934894
DOI: 10.1021/acs.nanolett.3c03112

Abstract

Two-dimensional antiferromagnets have garnered considerable interest for the next generation of functional spintronics. However, many bulk materials from which two-dimensional antiferromagnets are isolated are limited by their air sensitivity, low ordering temperatures, and insulating transport properties. TaFe_1+yTe₃ aims to address these challenges with increased air stability, metallic transport, and robust antiferromagnetism. Here, we synthesize TaFe_1+yTe₃ (y = 0.14), identify its structural, magnetic, and electronic properties, and elucidate the relationships between them. Axial-dependent high-field magnetization measurements on TaFe_1.14Te₃ reveal saturation magnetic fields ranging between 27 and 30 T with saturation magnetic moments of 2.05-2.12 μ_B. Magnetotransport measurements confirm that TaFe_1.14Te₃ is metallic with strong coupling between magnetic order and electronic transport. Angle-resolved photoemission spectroscopy measurements across the magnetic transition uncover a complex interplay between itinerant electrons and local magnetic moments that drives the magnetic transition. We demonstrate the ability to isolate few-layer sheets of TaFe_1.14Te₃, establishing TaFe_1.14Te₃ as a potential platform for two-dimensional spintronics.

Keywords: angle-resolved photoemission spectroscopy; high-field magnetic susceptibility; layered antiferromagnetism; magnetic metals; magnetotransport; van der Waals materials.