Browsing by Author "Tessmer, S. H."

Now showing items 1-3 of 3

    • Article  

      Role of K/Bi disorder in the electronic structure of β -K2 Bi8 Se13 

      Hoang, K.; Tomic, A.; Mahanti, S. D.; Kyratsi, Theodora; Chung, D. Y.; Tessmer, S. H.; Kanatzidis, M. G. (2009)
      We have carried out tunneling spectroscopy and first-principles studies for β -K2 Bi8 Se13, a promising thermoelectric material with partially disordered mixed K/Bi sites. The tunneling data, obtained with a scanning ...
    • Article  

      Scanning tunneling microscopy of defect states in the semiconductor (formula presented) 

      Urazhdin, S.; Bilc, D. I.; Tessmer, S. H.; Mahanti, S. D.; Kyratsi, Theodora; Kanatzidis, M. G. (2002)
      Scanning tunneling spectroscopy images of (formula presented) doped with excess Bi reveal electronic defect states with a striking shape resembling clover leaves. With a simple tight-binding model, we show that the geometry ...
    • Article  

      Surface effects in layered semiconductors Bi2Se3 and Bi2Te3 

      Urazhdin, S.; Bilc, D. I.; Mahanti, S. D.; Tessmer, S. H.; Kyratsi, Theodora; Kanatzidis, M. G. (2004)
      Scanning tunneling spectroscopy of Bi2Se3 and Bi2Te3 layered narrow gap semiconductors reveals finite in-gap density of states and suppressed conduction in the energy range of high valence-band states. Electronic structure ...