Controlling the 2DEG states evolution at a metal/Bi$_2$Se$_3$ interface
| Autor: | Noh, Han-Jin, Jeong, Jinwon, Cho, En-Jin, Park, Joonbum, Kim, Jun Sung, Kim, Ilyou, Park, Byeong-Gyu, Kim, Hyeong-Do |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Phys. Rev. B 91, 121110 (2015) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.91.121110 |
| Popis: | We have demonstrated that the evolution of the two-dimensional electron gas (2DEG) system at an interface of metal and the model topological insulator (TI) Bi$_2$Se$_3$ can be controlled by choosing an appropriate kind of metal elements and by applying a low temperature evaporation procedure. In particular, we have found that only topological surface states (TSSs) can exist at a Mn/Bi$_2$Se$_3$ interface, which would be useful for implementing an electric contact with surface current channels only. The existence of the TSSs alone at the interface was confirmed by angle-resolved photoemission spectroscopy (ARPES). Based on the ARPES and core-level x-ray photoemission spectroscopy measurements, we propose a cation intercalation model to explain our findings. Comment: 13 pages, 4 figures |
| Databáze: | arXiv |
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