| Autor: |
Mukherjee, Saumya, Jung, Sung Won, Weber, Sophie F., Xu, Chunqiang, Qian, Dong, Xu, Xiaofeng, Biswas, Pabitra K., Kim, Timur K., Chapon, Laurent C., Watson, Matthew D., Neaton, Jeffrey B., Cacho, Cephise |
| Rok vydání: |
2019 |
| Předmět: |
|
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1038/s41598-020-69926-8 |
| Popis: |
Transition-metal dichalcogenides (TMDs) offer an ideal platform to experimentally realize Dirac fermions. However, typically these exotic quasiparticles are located far away from the Fermi level, limiting the contribution of Dirac-like carriers to the transport properties. Here we show that NiTe2 hosts both bulk Type-II Dirac points and topological surface states. The underlying mechanism is shared with other TMDs and based on the generic topological character of the Te p-orbital manifold. However, unique to NiTe2, a significant contribution of Ni d orbital states shifts the energy of the Type-II Dirac point close to the Fermi level. In addition, one of the topological surface states intersects the Fermi energy and exhibits a remarkably large spin splitting of 120 meV. Our results establish NiTe2 as an exciting candidate for next-generation spintronics devices. |
| Databáze: |
arXiv |
| Externí odkaz: |
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