| Full text | |
| Author(s): |
Piva, M. M.
;
Souza, J. C.
;
Lombardi, G. A.
;
Pakuszewski, K. R.
;
Adriano, C.
;
Pagliuso, P. G.
;
Nicklas, M.
Total Authors: 7
|
| Document type: | Journal article |
| Source: | PHYSICAL REVIEW MATERIALS; v. 7, n. 7, p. 8-pg., 2023-07-19. |
| Abstract | |
The Weyl semimetal CeAlGe is a promising material to study nontrivial topologies in real and momentum space due to the presence of a topological magnetic phase. Our results at ambient pressure show that the electronic properties of CeAlGe are extremely sensitive to small stoichiometric variations. In particular, the topological Hall effect (THE) present in CeAlGe is absent in some samples of almost identical chemical composition. The application of external pressure favors the antiferromagnetic ground state. It also induces a THE where it was not visible at ambient pressure. Furthermore, a small pressure is sufficient to drive the single region of the THE in magnetic fields into two different ones. Our results reveal an extreme sensitivity of the electronic properties of CeAlGe to tiny changes in its chemical composition, leading to a high tunability by external stimuli. We can relate this sensitivity to a shift in the Fermi level and to domain walls. (AU) | |
| FAPESP's process: | 17/10581-1 - Emergent phenomena in reduced dimension systems |
| Grantee: | Pascoal Jose Giglio Pagliuso |
| Support Opportunities: | Special Projects |
| FAPESP's process: | 20/12283-0 - Scanning tunneling microscopy in topological nontrivial compounds |
| Grantee: | Jean Carlo Souza |
| Support Opportunities: | Scholarships abroad - Research Internship - Doctorate |
| FAPESP's process: | 18/11364-7 - Magnetic properties of complex systems with non-trivial topology |
| Grantee: | Jean Carlo Souza |
| Support Opportunities: | Scholarships in Brazil - Doctorate |