AI 中文总结
本研究在块体莫尔材料(Sr6TaS8)1+x(TaS2)8单晶中发现环境压力下的块体超导电性，转变温度2.5 K，并观察到270 K附近的电荷密度波异常，凸显块体莫尔晶体作为研究关联量子现象的新平台。
AI 中文摘要
莫尔材料提供了一个多功能平台，能够实现由平带增强关联效应所产生的新兴电子态。此类系统中已报道了包括超导电性、低维铁磁性、莫特绝缘相和拓扑现象在内的多种现象。迄今为止，莫尔现象主要在人造组装的低维范德华异质结中得以探索，其中相对扭转角和晶格对准在器件制造过程中受到控制。近期，本征生长的块体莫尔晶体作为一种互补的材料平台出现，其中组成层之间的晶格失配在整个块体晶体中产生了相干的莫尔超晶格。在此，我们报道了在环境压力条件下，最近报道的块体莫尔材料(Sr6TaS8)1+x(TaS2)8的单晶中块体超导电性的证据。该材料在Tc = 2.5 K处表现出超导转变，这一现象在单晶和多晶样品的电输运、磁化率和热容测量中均得到一致证实。输运测量显示在270 K附近存在显著异常，暗示该莫尔体系中存在电荷密度波转变。块体超导电性的观察确立了超导电性作为这种本征合成莫尔材料中的一种新兴相，并凸显了块体莫尔晶体作为超越人造组装二维异质结、研究关联量子现象的有前景平台。
英文摘要
Moire materials provide a versatile platform realizing emergent electronic states arising from enhanced correlation due to flat bands. A variety of phenomena including superconductivity, low dimensional ferromagnetism, Mott insulating phase, topological phenomena have been reported in such systems. To date, moire phenomena have been predominantly explored in artificially assembled low-dimensional van der Waals heterostructures, where relative twist and lattice alignment are controlled during device fabrication. Recently, intrinsically grown bulk moire crystals have emerged as a complementary materials platform, in which lattice mismatch between constituent layers generates a coherent moire superlattice throughout the bulk crystal. Here we report the evidence of bulk superconductivity in single crystals of a recently reported bulk Moire materials (Sr6TaS8)1+x(TaS2)8 under ambient pressure conditions. The material exhibits a superconducting transition at Tc = 2.5 K, evidenced consistently by electrical transport, magnetic susceptibility, and heat-capacity measurements on single-crystal and polycrystalline samples. Transport measurements reveal a pronounced anomaly near 270 K, suggestive of a charge-density-wave transition in this moire system. The observation of bulk superconductivity establishes superconductivity as an emergent phase in this intrinsically synthesized moire material and highlights bulk moire crystals as a promising platform for investigating correlated quantum phenomena beyond artificially assembled two-dimensional heterostructures.
Comments13 pages, 6 figure
