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Epitaxial growth of single tellurium atomic wires on a Cu2Sb surface alloy
Applied Physics Letters  (IF3.971),  Pub Date : 2020-02-10, DOI: 10.1063/1.5140376
Dechun Zhou, Heping Li, Nan Si, Yixuan Jiang, Han Huang, Hui Li, Tianchao Niu

One-dimensional (1D) zigzag tellurium (Te) wires on an alloyed Cu2Sb (111) surface are produced and characterized by combining molecular beam epitaxy and high-resolution scanning tunneling microscopy, respectively. These 1D Te wires with zigzag shapes exhibit a uniform width and well-defined periodicity grown in registry on a Cu2Sb (111) substrate. Density functional theory (DFT) calculations revealed a remarkable bandgap of 0.3 eV induced by spin–orbit coupling. Interestingly, the resulting Te wires became metallic on the substrate, as confirmed by scanning tunneling spectroscopy and DFT. The present study provides a platform for constructing periodic atomic wires on alloyed surfaces, which may be extended further to integrate them into circuits.