Transition from intrinsic to extrinsic anomalous Hall effect in the ferromagnetic Weyl semimetal PrAlGe1-xSix
Abstract
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 (RS), but significant changes in the ordinary Hall coefficient (R0) in PrAlGe1-xSix as a function of x. By comparing the magnitude of R0 and RS, we identify two regimes: |R0| < |RS| for x ≤ 0.5 and |R0| > |RS| 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 extrinsicmore »
- Authors:
-
- Boston College, Chestnut Hill, MA (United States). Dept. of Physics
- Northeastern Univ., Boston, MA (United States). Dept. of Physics; Shenzhen Univ. (China)
- Temple Univ., Philadelphia, PA (United States). Dept. of Physics and Temple Materials Institute
- Academia Sinica, Taipei (Taiwan). Inst. of Physics
- Northeastern Univ., Boston, MA (United States). Dept. of Physics
- National High Magnetic Field Lab., Tallahassee, FL (United States)
- National Sun Yat-sen Univ., Kaohsiung (Taiwan). Dept. of Physics
- Publication Date:
- Research Org.:
- Northeastern Univ., Boston, MA (United States); Univ. of California, Oakland, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1800447
- Alternate Identifier(s):
- OSTI ID: 1591964
- Grant/Contract Number:
- FG02-07ER46352; AC02-05CH11231; AC02- 05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- APL Materials
- Additional Journal Information:
- Journal Volume: 8; Journal Issue: 1; Journal ID: ISSN 2166-532X
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Crystallography; Thermodynamic properties; Fermi surface; Energy dispersive X-ray spectroscopy; Second harmonic generation; Crystal lattices; Hall effect; Weyl semimetal; Density functional theory; Electronic band structure
Citation Formats
Yang, Hung-Yu, Singh, Bahadur, Lu, Baozhu, Huang, Cheng-Yi, Bahrami, Faranak, Chiu, Wei-Chi, Graf, David, Huang, Shin-Ming, Wang, Baokai, Lin, Hsin, Torchinsky, Darius, Bansil, Arun, and Tafti, Fazel. Transition from intrinsic to extrinsic anomalous Hall effect in the ferromagnetic Weyl semimetal PrAlGe1-xSix. United States: N. p., 2020.
Web. doi:10.1063/1.5132958.
Yang, Hung-Yu, Singh, Bahadur, Lu, Baozhu, Huang, Cheng-Yi, Bahrami, Faranak, Chiu, Wei-Chi, Graf, David, Huang, Shin-Ming, Wang, Baokai, Lin, Hsin, Torchinsky, Darius, Bansil, Arun, & Tafti, Fazel. Transition from intrinsic to extrinsic anomalous Hall effect in the ferromagnetic Weyl semimetal PrAlGe1-xSix. United States. https://doi.org/10.1063/1.5132958
Yang, Hung-Yu, Singh, Bahadur, Lu, Baozhu, Huang, Cheng-Yi, Bahrami, Faranak, Chiu, Wei-Chi, Graf, David, Huang, Shin-Ming, Wang, Baokai, Lin, Hsin, Torchinsky, Darius, Bansil, Arun, and Tafti, Fazel. Thu .
"Transition from intrinsic to extrinsic anomalous Hall effect in the ferromagnetic Weyl semimetal PrAlGe1-xSix". United States. https://doi.org/10.1063/1.5132958. https://www.osti.gov/servlets/purl/1800447.
@article{osti_1800447,
title = {Transition from intrinsic to extrinsic anomalous Hall effect in the ferromagnetic Weyl semimetal PrAlGe1-xSix},
author = {Yang, Hung-Yu and Singh, Bahadur and Lu, Baozhu and Huang, Cheng-Yi and Bahrami, Faranak and Chiu, Wei-Chi and Graf, David and Huang, Shin-Ming and Wang, Baokai and Lin, Hsin and Torchinsky, Darius and Bansil, Arun and Tafti, Fazel},
abstractNote = {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 (RS), but significant changes in the ordinary Hall coefficient (R0) in PrAlGe1-xSix as a function of x. By comparing the magnitude of R0 and RS, we identify two regimes: |R0| < |RS| for x ≤ 0.5 and |R0| > |RS| 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.},
doi = {10.1063/1.5132958},
journal = {APL Materials},
number = 1,
volume = 8,
place = {United States},
year = {Thu Jan 16 00:00:00 EST 2020},
month = {Thu Jan 16 00:00:00 EST 2020}
}
Web of Science
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