Two-dimensional multiferroic material of metallic p-doped SnSe

• Published in: Nature communications Vol. 13; no. 1; p. 6130
• Main Authors: Du, Ruofan, Wang, Yuzhu, Cheng, Mo, Wang, Peng, Li, Hui, Feng, Wang, Song, Luying, Shi, Jianping, He, Jun
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group 17.10.2022; Nature Publishing Group UK; Nature Portfolio
• Subjects: Charge transfer; Coexistence; Coupling; Crystal structure; Curie temperature; Depolarization; Ferrimagnetism; Ferroelectricity; Ferromagnetic materials; Heterostructures; Magnetic properties; Microscopy; Morphology; Multiferroic materials; Physical properties; Physical vapor deposition; Room temperature; Synthesis; Two dimensional materials; Vapors
• ISSN: 2041-1723; 2041-1723
• DOI: 10.1038/s41467-022-33917-2

Abstract Two-dimensional multiferroic materials have garnered broad interests attributed to their magnetoelectric properties and multifunctional applications. Multiferroic heterostructures have been realized, nevertheless, the direct coupling between ferroelectric and ferromagnetic order in a single material still remains challenging, especially for two-dimensional materials. Here, we develop a physical vapor deposition approach to synthesize two-dimensional p-doped SnSe. The local phase segregation of SnSe 2 microdomains and accompanying interfacial charge transfer results in the emergence of degenerate semiconductor and metallic feature in SnSe. Intriguingly, the room-temperature ferrimagnetism has been demonstrated in two-dimensional p-doped SnSe with the Curie temperature approaching to ~337 K. Meanwhile, the ferroelectricity is maintained even under the depolarizing field introduced by SnSe 2 . The coexistence of ferrimagnetism and ferroelectricity in two-dimensional p-doped SnSe verifies its multiferroic feature. This work presents a significant advance for exploring the magnetoelectric coupling in two-dimensional limit and constructing high-performance logic devices to extend Moore’s law.