Closing of the Mott gap near step edges in NiS2
| Autor: | Yasui, Yuuki, Iwata, Kota, Okazaki, Shota, Miyasaka, Shigeki, Sugimoto, Yoshiaki, Hanaguri, Tetsuo, Takagi, Hidenori, Sasagawa, Takao |
|---|---|
| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | Phys. Rev. B 110, 045139 (2024) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.110.045139 |
| Popis: | A prototypical charge-transfer type Mott insulator NiS2 pyrite exhibits a metal-insulator transition with bandwidth control. Recent discoveries on surface-specific electronic states on other 3d transition-metal disulfide pyrites motivate us to further investigate the surface of NiS2, where metallic surface conduction is discussed. Here, the spectroscopic-imaging scanning-tunneling-microscopy observations revealed that the surface is not metallic, contrary to the expectation. Instead, the Mott gap is closed near step edges, suggesting possible electrical conduction from one-dimensional channels. The edge anomaly was observed irrespective of its magnetic order and is limited to the insulator phases. Comment: 5 pages, 5 figures |
| Databáze: | arXiv |
| Externí odkaz: |
|