Noncollinear ferromagnetic Weyl semimetal with anisotropic anomalous Hall effect
Journal Article
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· Physical Review. B
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- Boston College, Chestnut Hill, MA (United States). Dept. of Physics
- Tata Inst. of Fundamental Research, Colaba, Mumbai (India). Dept. of Condensed Matter Physics and Materials Science; Northeastern Univ., Boston, MA (United States). Dept. of Physics
- Johns Hopkins Univ., Baltimore, MD (United States). Dept. of Physics and Astronomy. Inst. for Quantum Matter
- Temple Univ., Philadelphia, PA (United States). Temple Materials Inst. Dept. of Physics
- Northeastern Univ., Boston, MA (United States). Dept. of Physics
- Sun Yat-Sen Univ., Guangzhou (China). Dept. of Physics
- Univ. of Connecticut, Storrs, CT (United States). Dept. of Physics
- Univ. of Connecticut, Storrs, CT (United States). Dept. of Physics; Univ. of Connecticut, Storrs, CT (United States). Inst. of Materials Science
- Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)
- National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Center for Neutron Research
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Neutron Scattering Division
- Academia Sinica, Taipei (Taiwan). Inst. of Physics
An emerging frontier in condensed matter physics involves novel electromagnetic responses, such as the anomalous Hall effect (AHE), in ferromagnetic Weyl semimetals (FM-WSMs). Candidate FM-WSMs have been limited to materials that preserve inversion symmetry and generate Weyl crossings by breaking the time-reversal symmetry. These materials share three common features: a centrosymmetric lattice, a collinear FM ordering, and a large AHE observed when the field is parallel to the magnetic easy axis. Here, we present CeAlSi as a new type of FM-WSM in which the Weyl nodes are stabilized by breaking the inversion symmetry, but their positions are tuned by breaking the time-reversal symmetry. Unlike the other FM-WSMs, CeAlSi has a noncentrosymmetric lattice, a noncollinear FM ordering, and a novel AHE that is anisotropic between the easy and hard magnetic axes. It also exhibits large FM domains that are promising for exploring both device applications and the interplay between the Weyl nodes and FM domain walls.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC02-05CH11231; AC05-00OR22725; SC0019275; SC0019331
- OSTI ID:
- 1788045
- Journal Information:
- Physical Review. B, Journal Name: Physical Review. B Journal Issue: 11 Vol. 103; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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