2021/08/03 by Adam K. Budniak, Budniak, Adam K., Szymon J. Zelewski +15 · 1 citation
Engineering · Materials Science · #2D Materials and Applications #Applied Physics (physics.app-ph) #Chalcogenide Semiconductor Thin Films #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Quantum Dots Synthesis And Properties
paper · pdf · doi:10.48550/arxiv.2108.01742
openalex publication_date 2021/08/03 · openalex created_date 2022/07/25 · openalex updated_date 2026/07/28
Lamellar structures of transition metal phosphorus trisulfides possess strong\nintralayer bonding, albeit adjacent layers are held by weak van der Waals\ninteractions. Those compounds received enormous interest due to their unique\ncombination of optical and long-range magnetic properties. Among them, iron\nphosphorus trisulfide (FePS3) gathered special attention for being a\nsemiconductor with an absorption edge in the near-infrared, as well as showing\nan Ising-like anti-ferromagnetism. We report a successful growth of centimeter\nsize bulk FePS3 crystals with a chemical yield above 70%, whose\ncrystallographic structure and composition were carefully identified by\nadvanced electron microscopy methodologies, including atomic resolution\nelemental mapping, along with photoelectron spectroscopy. The knowledge on the\noptical activity of FePS3 is extended utilizing temperature-dependent\nabsorption and photoacoustic spectroscopies, while measurements were\ncorroborated with density-functional theory calculations. Temperature-dependent\nexperiments showed a small and monotonic band-edge energy shift down to 115 K\nand exposed the interconnected importance of electron-phonon coupling. Most of\nall, the correlation between the optical behavior and the magnetic phase\ntransition is revealed, which shows the practical utilization of\ntemperature-dependent optical absorption to investigate magnetic interactions.\n