Superconductivity in two-dimensional boron allotropes

Predicting stable phase monolayer Mo2C (MXene), a superconductor with chemically-tunable critical temperature

“…Previously, superconductivity was explored theoretically in doped graphane, 1 graphene, 2 B 2 C single layers, 3 doped phosphorene, 4 and, most recently, two-dimensional boron. 5,6 However, graphane, graphene and phosphorene require substantial doping to achieve good metallicity, whereas other intrinsically metallic materials such as B 2 C or 2D boron are either hypothetical or may have their properties strongly affected by the growth substrate. In contrast, MXenes, or monolayer transition metal carbides and carbonitrides, have been synthesized as standalone 2D layers with measured good metallic conductivity.…”

Electronic properties of8−Pmmnborophene

“…Stable phases of boron were portended through a series of computational studies based on evolutionary algorithms, with the so-called α-sheet as the most stable structure [1]. Several 2D boron structures have been predicted to exhibit superconductivity with the critical temperature above that of liquid hydrogen [3].…”

Solar‐Inspired Water Purification Based on Emerging 2D Materials: Status and Challenges

“…Recently, borophene came into researchers' sight because of its unique position close to carbon and it is the lightest Xenes. The polymorphism and anisotropic structure of borophene lead to many attractive properties, including the optical transparency, metallicity, phonon‐mediated superconductivity, photoluminescence in visible region (≈626 nm), efficient thermal transport, mechanical flexibility, etc. When considering its photothermal application, there is a drawback of weak absorption with extinction coefficient of ≈2.5 L g −1 cm −1 , making the application of photothermal evaporation full of challenge.…”