180$^\circ$-twisted bilayer ReSe$_2$ as an artificial noncentrosymmetric semiconductor
| Autor: | Akatsuka, S., Sakano, M., Yamamoto, T., Nomoto, T., Arita, R., Murata, R., Sasagawa, T., Watanabe, K., Taniguchi, T., Kitamura, M., Horiba, K., Sugawara, K., Souma, S., Sato, T., Kumigashira, H., Shinokita, K., Wang, H., Matsuda, K., Masubuchi, S., Machida, T., Ishizaka, K. |
|---|---|
| Rok vydání: | 2023 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | We have fabricated a 180$^\circ$-twisted bilayer ReSe$_2$ by stacking two centrosymmetric monolayer ReSe$_2$ flakes in opposite directions, which is expected to lose spatial inversion symmetry. By the second harmonic generation and angle-resolved photoemission spectroscopy, we successfully observed spatial inversion symmetry breaking and emergent band dispersions. The band calculation shows the finite lifting of spin degeneracy (~50 meV) distinct from natural monolayer and bilayer ReSe$_2$. Our results demonstrate that the spin-momentum locked state, which leads to spintronic functions and Berry-curvature-related phenomena, can be realized even with the stacking of centrosymmetric monolayers. Comment: 15 pages, 4 figures |
| Databáze: | arXiv |
| Externí odkaz: |
|