Combined piezoelectricity and ferrovalley properties in Janus monolayer VClBr

Pseudo Janus based on rhombohedral homobilayer transition metal dichalcogenides

“…With the progress of magnetic van der Waals materials, the additional magnetism enriches the functionality of 3R stacking, such as for multi-ferroelectrics 37 in VS 2 . The coupling of the electric polarization and spin and valley degrees of freedom in monolayer Janus, such as MnSSe, 5 Cr 2 I 3 Br 3 , 7 and VClBr, 38 also leads to the skyrmion state and ferrovalley properties. Therefore, the skyrmion state and ferrovalley properties in 3R stacked magnetic van der Waals materials are expected and deserve future investigation.…”

Tailoring spin waves in 2D transition metal phosphorus trichalcogenides via atomic-layer substitution

“…21–24 A well-established approach that drastically modifies the crystal structure of a 2D material is the development of the so-called Janus 2D materials. 25–30 The term Janus refers to structures in which the two faces of the material are asymmetric, leading to out-of-plane broken mirror symmetry. This can result in novel properties such as strong Rashba spin splitting, 31–33 vertical piezoelectricity 34 and second-harmonic generation response.…”

The Thermal Stability of Janus Monolayers SnXY (X, Y = O, S, Se): Ab-Initio Molecular Dynamics and Beyond

“…Although many Janus monolayers have been proposed to be energetically and dynamically stable in recent years [ 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 ], less is known about their thermal stability and an explicit understanding is therefore quite necessary, especially considering various application potentials at different temperature regions. In this work, using the Janus monolayers SnXY (X, Y = O, S, Se) as a prototypical class of examples, we focus on their thermal stability by performing ab-initio molecular dynamics (AIMD) simulations at a series of temperatures.…”