About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
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| Symposium
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Honorary Symposium in Celebration of Prof. Michel Barsoum’s 70th Birthday
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| Presentation Title |
Surface Electronic Structure of the Zr3SnC2 MAX Phase |
| Author(s) |
Takahiro Ito, Thierry Ouisse, Manaya Mita, Kiyohisa Tanaka, Lourent Jouffret, Hanna Pazniak, Serge Quessada |
| On-Site Speaker (Planned) |
Takahiro Ito |
| Abstract Scope |
MAX phase compounds, such as Mn+1AXn, have attracted significant attention for their potential to be converted into MXenes, two-dimensional materials formed by removing the A atoms. In this study, we have performed angle-resolved photoemission spectroscopy (ARPES) on Zr3SnC2 to directly investigate the electronic structure of this system. We found that Zr3SnC2 single crystals exhibit non-reconstructed surfaces after mechanical cleavage, with distinct surface state bands characterized by well-defined energy dispersions. Just after cleavage, the contribution of those surface bands to the ARPES signal largely prevails over the bulk one. Those surface state dispersions can be satisfactorily retrieved and explained by density functional theory (DFT). Since the lack of surface reconstruction was also observed on other 211 MAX phases, this result can probably be generalized to many MAX phases. The result suggests the feasibility of studying surface topological properties using DFT for various MAX phases, assuming non-reconstructed surfaces as observed in Zr3SnC2. |