The front cover shows two‐dimensional hexagonal boron nitride sheets that are obtained from melt‐quenching. As described by N. M. Anoop Krishnan and co‐workers in article number 1900174, the structures exhibit a polycrystalline or glassy structure depending on the cooling rate. Furthermore, these structures are stable at room temperature, although they exhibit significant out‐of‐plane deflections.

中文翻译：

---

六方氮化硼：六方氮化硼中的玻璃化转变和结晶：取向顺序的关键作用（Adv。Theory Simul。2/2020）

前盖显示了二维六方氮化硼片，这些片是通过熔融淬火获得的。如NM Anoop Krishnan及其同事在商品编号1900174中所述，根据冷却速率的不同，结构呈现多晶或玻璃状结构。此外，尽管这些结构表现出明显的平面外变形，但它们在室温下仍然稳定。