Electronic Band Structure Changes across the Antiferromagnetic Phase Transition of Exfoliated MnPS3 Flakes Probed by μ-ARPES

Jeff Strasdas, Benjamin Pestka, Miłosz Rybak, Adam K. Budniak, Niklas Leuth, Honey Boban, Vitaliy Feyer, Iulia Cojocariu, Daniel Baranowski, José Avila, Pavel Dudin, Aaron Bostwick, Chris Jozwiak, Eli Rotenberg, Carmine Autieri, Yaron Amouyal, Lukasz Plucinski, Efrat Lifshitz, Magdalena Birowska, Markus Morgenstern

Research output: Contribution to journalArticlepeer-review

Abstract

Exfoliated magnetic 2D materials enable versatile tuning of magnetization, e.g., by gating or providing proximity-induced exchange interaction. However, their electronic band structure after exfoliation has not been probed, presumably due to their photochemical sensitivity. Here, we provide micrometer-scale angle-resolved photoelectron spectroscopy of the exfoliated intralayer antiferromagnet MnPS3 above and below the Néel temperature down to one monolayer. Favorable comparison with density functional theory calculations enables identifying the orbital character of the observed bands. Consistently, we find pronounced changes across the Néel temperature for bands consisting of Mn 3d and 3p levels of adjacent S atoms. The deduced orbital mixture indicates that the superexchange is relevant for the magnetic interaction. There are only minor changes between monolayer and thicker films, demonstrating the predominant 2D character of MnPS3. The novel access is transferable to other MPX3 materials (M: transition metal, P: phosphorus, X: chalcogenide), providing several antiferromagnetic arrangements.

Original languageEnglish
Pages (from-to)10342-10349
Number of pages8
JournalNano Letters
Volume23
Issue number22
DOIs
StatePublished - 22 Nov 2023

Keywords

  • angular resolved photoelectron spectroscopy
  • density functional theory
  • layered magnetism
  • magnetic 2D materials
  • μ-ARPES

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • Condensed Matter Physics
  • Mechanical Engineering
  • Bioengineering
  • General Materials Science

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