Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session T00: Poster Session III (1pm-4pm PST)
1:00 PM,
Thursday, March 9, 2023
Room: Exhibit Hall (Forum Ballroom)
Sponsoring
Unit:
APS
Abstract: T00.00161 : Creating periodic vacancies in atomic chains within the individual layers of a 2D magnet*
Presenter:
Eugene Park
(Massachusetts Institute of Technology)
Authors:
Eugene Park
(Massachusetts Institute of Technology)
Mads A Weile
(Technical University of Denmark)
Julian P Klein
(Massachusetts Institute of Technology)
John P Philbin
(University of California, Los Angeles)
Zdeněk Sofer
(Institute of Chemical Technology, Prague)
Prineha Narang
(University of California, Los Angeles)
Frances M Ross
(Massachusetts Institute of Technology)
Here, we first confirm through scanning transmission electron microscopy that each layer of AgCrP2S6 contains alternating diatomic chains of silver and chromium.2 We then show that irradiation with 200kV electrons introduces periodic vacancies on the silver diatomic chains and we study the phase transitions between different configurations with respect to electron dose. STEM simulation is performed to investigate the process of electron beam-induced periodic vacancy formation and the structural transition in more detail. Density functional theory calculations further quantify the pathway along which the structural change of the Ag diatomic chain occurs. Lastly, we relate the periodic vacancy formation to the magnetic properties of the material. We believe that this irradiation-induced transition may provide a pathway towards defining local defects and spin configurations in this and other analogous 2D magnets.
References
1. Gibertini, M., et al. Nat. Nanotechnol. 14, 408 (2019)
2. Selter S., et al. Crystals 11, 500 (2021)
*DOE, ONR MURI
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