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journal id: "physicalxreviewxb"
| Authors | F. Massee, S. de Jong, Y. Huang, J. Kaas, E. van Heumen, J.B. Goedkoop, M.S. Golden | | Title | Cleavage surfaces of the BaFe2−xCoxAs2 and FeySe1−xTex superconductors: A combined STM plus LEED study |
| Journal | Physical Review B |
| Volume | 80 |
| Year | 2009 |
| Issue | 14 |
| Pages | 140507(R)- |
| ISSN | 10980121 |
| Faculty | Faculty of Science |
| Institute/dept. | FNWI: Van der Waals-Zeeman Institute (WZI) |
| Abstract | We elucidate the termination surface of cleaved single crystals of the BaFe2−xCoxAs2 and FeySe1−xTex families of the high-temperature iron-based superconductors. By combining scanning tunneling microscopic data with low-energy electron diffraction we prove that the termination layer of the BaFe2As2 systems is a remnant of the Ba layer, which exhibits a complex diversity of ordered and disordered structures. The observed surface topographies and their accompanying superstructure reflections in electron diffraction depend on the cleavage temperature. In stark contrast, FeySe1−xTex possesses only a single termination structure—that of the tetragonally ordered Se1−xTex layer. |
| Document type | Article |
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