| Abstract Scope |
Among the longstanding efforts to realize room-temperature (RT) magnetic semiconductors, dilute incorporation of magnetic metal atoms into nonmagnetic semiconductors has been widely explored. However, achieving robust magnetic ordering for functional RT diluted magnetic semiconductors (DMSs) remains a significant challenge. Here, we report an industry-compatible temperature-gradient melt-growth strategy for the controlled synthesis of large-size single-crystal DMSs based on van der Waals (vdW) semiconductors. In this approach, dilute magnetic doping is enabled by transition-metal iodides as precursors, whose low melting points facilitate efficient incorporation during crystal growth. Using this method, we obtain centimeter-scale bulk single crystals of Fe-doped SnSe (Fe:SnSe) and Fe-doped SnSe₂ (Fe:SnSe₂), both exhibiting robust RT magnetic ordering with transition temperatures of 310 K and 325 K, respectively. This scalable growth strategy, leveraging low-melting transition-metal halides as dopant sources, provides a general route toward a broad class of vdW DMSs and related quantum materials with tunable magnetic and semiconducting properties. |