Atomistic origin of an ordered superstructure induced superconductivity in layered chalcogenides

R. Ang, Z. C. Wang, C. L. Chen, J. Tang, N. Liu, Y. Liu, W. J. Lu, Y. P. Sun, T. Mori, Y. Ikuhara

    研究成果: Article査読

    35 被引用数 (Scopus)


    Interplay among various collective electronic states such as charge density wave and superconductivity is of tremendous significance in low-dimensional electron systems. However, the atomistic and physical nature of the electronic structures underlying the interplay of exotic states, which is critical to clarifying its effect on remarkable properties of the electron systems, remains elusive, limiting our understanding of the superconducting mechanism. Here, we show evidence that an ordering of selenium and sulphur atoms surrounding tantalum within star-of-David clusters can boost superconductivity in a layered chalcogenide 1T-TaS 2â 'x Se x, which undergoes a superconducting transition in the nearly commensurate charge density wave phase. Advanced electron microscopy investigations reveal that such an ordered superstructure forms only in the x area, where the superconductivity manifests, and is destructible to the occurrence of the Mott metal-insulator transition. The present findings provide a novel dimension in understanding the relationship between lattice and electronic degrees of freedom.

    ジャーナルNature communications
    出版ステータスPublished - 2015 2月

    ASJC Scopus subject areas

    • 化学 (全般)
    • 生化学、遺伝学、分子生物学(全般)
    • 一般
    • 物理学および天文学(全般)


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