Antiferromagnetic topological insulator with selectively gapped Dirac cones
A. Honma, D. Takane, S. Souma, K. Yamauchi, Y. Wang, K. Nakayama, K. Sugawara, M. Kitamura, K. Horiba, H. Kumigashira, K. Tanaka, T. K. Kim, C. Cacho, T. Oguchi, T. Takahashi, Yoichi Ando, T. Sato · 2023
Read Antiferromagnetic topological insulator with selectively gapped Dirac cones by A. Honma, D. Takane, S. Souma, K. Yamauchi, Y. Wang, K. Nakayama, K. Sugawara, M. Kitamura, K. Horiba, H. Kumigashira, K. Tanaka, T. K. Kim, C. Cacho, T. Oguchi, T. Takahashi, Yoichi Ando, T. Sato (2023) in the Tower of Babel, a free online library of public-domain works preserved in clean, searchable text. No sign-up. The full text is served as a plain-text file at a predictable URL, where text is present: https://antarctic-labs.com/tower-of-babel/pmc-10656484.txt.
Description
Honma and a large team of co-authors report a new quantum material in a 2023 physics study. Materials that are magnetic in an antiferromagnetic pattern, yet act as topological insulators, could host exotic effects wanted for future devices. Proving the link between their magnetism and their surface states has been hard for want of a clean example.
The team found that example in the compound NdBi. Using a focused beam technique that maps electron energies, they read the surface states on two kinds of magnetic domains. One surface showed cone-shaped states with a giant energy gap; the other kept its cones gapless, even though magnetism broke a symmetry that usually protects them. The contrast shows how combined symmetries can shield these states. The authors say the finding widens the hunt for exotic quantum effects in magnetic materials.
Catalog record
| CREATOR | A. Honma, D. Takane, S. Souma, K. Yamauchi, Y. Wang, K. Nakayama, K. Sugawara, M. Kitamura, K. Horiba, H. Kumigashira, K. Tanaka, T. K. Kim, C. Cacho, T. Oguchi, T. Takahashi, Yoichi Ando, T. Sato |
|---|---|
| YEAR | 2023 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 52 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |