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    • Surface oxidation of the topological insulator Bi2Se3 

      Green, Avery J.; Dey, Sonal; An, Yong Q.; O'Brien, Brendan; O'Mullane, Samuel; Thiel, Bradley; Diebold, Alain C. (Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, 2016)
      An understanding of the aging and oxidation of the (0001) surface of Bi2Se3 is critical to a comprehensive physical picture of its topologically protected surface states. Here, the authors contribute new experimental ...
    • Tracking quintuple layer oxidation on cleaved Bi2Se3 by optical second-harmonic anisotropy 

      An, Yong Q.; Green, Avery J.; Diebold, Alain C. (Physical Review B, 2016)
      We find that the major and minor intensity lobes of a measured rotational-anisotropy pattern of optical second-harmonic generation (SHG) from a cleaved Bi2Se3 (111) surface can gradually change with time and eventually ...