Journal
APL MATERIALS
Volume 8, Issue 1, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.5132958
Keywords
-
Funding
- National Science Foundation [NSF/DMR-1644779, NSF/DMR-1708929]
- U.S. Department of Energy (DOE), Office of Basic Energy Sciences [DE-FG02-07ER46352]
- National Energy Research Scientific Computing Center through DOE [DE-AC02-05CH11231]
- State of Florida
Ask authors/readers for more resources
Recent reports of a large anomalous Hall effect (AHE) in ferromagnetic Weyl semimetals (FM WSMs) have led to a resurgence of interest in this enigmatic phenomenon. However, due to a lack of tunable materials, the interplay between the intrinsic mechanism caused by Berry curvature and extrinsic mechanisms due to scattering remains unclear in FM WSMs. In this contribution, we present a thorough investigation of both the extrinsic and intrinsic AHEs in a new family of FM WSMs, PrAlGe1-xSix, where x can be tuned continuously. Based on the first-principles calculations, we show that the two end members, PrAlGe and PrAlSi, have different Fermi surfaces, but similar Weyl node structures. Experimentally, we observe moderate changes in the anomalous Hall coefficient (R-S), but significant changes in the ordinary Hall coefficient (R-0) in PrAlGe1-xSix as a function of x. By comparing the magnitude of R-0 and R-S, we identify two regimes: |R-0| < |R-S| for x <= 0.5 and |R-0| > |R-S| for x > 0.5. Through a detailed scaling analysis, we uncover a universal anomalous Hall conductivity (AHC) from intrinsic contribution when x <= 0.5. Such a universal AHC is absent for x > 0.5. Our study, thus, reveals the significance of extrinsic mechanisms in FM WSMs and reports the first observation of the transition from the intrinsic to extrinsic AHE in PrAlGe1-xSix.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available