A two-dimensional alloy of immiscible Bi and Sn atoms on Rh(111)

作者：Yuhara J^*; Yokoyama M; Matsui T

来源：Surface Science, 2012, 606(3-4): 456-460.

DOI：10.1016/j.susc.2011.11.006

• 2D film

We studied the atomic arrangements and the phase diagram of two-dimensional (2D) Bi-Sn binary films on Rh(111) with low-energy electron diffraction and scanning tunneling microscopy (STM). The 2D binary films exhibited (%26quot;2%26quot;x root 3)-(Bi,Sn), (root 7 x root 7)R19 degrees-(Bi,Sn), and (7 x 3 root 3)-(Bi,Sn) structures, depending on the compositional ratio of Hi and Sn. Atomically resolved STM images revealed that the binary films formed a BiSn3 ordered alloy for the (root 7 x root 7)R19 degrees -(Bi,Sn) structure and a solid solution alloy for the (%26quot;2%26quot;x root 3)-(Bi,Sn) structure. The atomic configuration for the (7 x 343)-(Bi,Sn) structure was closely related to that of (root 7 x root 7) R19 degrees -(Bi,Sn).

• 出版日期2012-2