Publication date: Available online 9 November 2016
Source:Thin Solid Films
Author(s): Minyeong Je, Youngbin Lee, Yong-Chae Chung
The feasibility of designing two-dimensional (2D) materials was investigated using monolayer Cr2 C, a member of the MXene family, with F and OH functional groups on each side of the surface. Interestingly, this study shows that the magnetic and electronic properties of Cr2 C with F and OH functional groups (i.e., Cr2 CF(OH), with one functional group on each side) can be predicted using previously known properties of Cr2 C with only one kind of functional group (i.e., either F or OH on both sides). Unlike typical functionalized 2D materials with different functional groups, each functional group of Cr2 CF(OH) has a negligible effect on the magnetic and electronic properties of the other side. This unique phenomenon results from the small differences in geometry between the functional groups, such as the coordination number, bond length, and thickness; the properties themselves come from those of Cr2 CF2 and Cr2 C(OH)2 , despite having different functional groups. Due to the preserved magnetic moments of the Cr atoms bound with each functional group, Cr2 CF(OH) exhibits ferrimagnetism. Likewise, semiconducting characters are present because the atomic contributions of each energy level from Cr2 CF2 and Cr2 C(OH)2 are maintained. Thus, the present work demonstrates that a combination of functional groups that shows certain desired properties can be selected when designing Cr2 C-based spintronic and electronic devices.
Source:Thin Solid Films
Author(s): Minyeong Je, Youngbin Lee, Yong-Chae Chung