期刊
PHYSICAL REVIEW B
卷 103, 期 11, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.103.115143
关键词
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资金
- National Science Foundation [NSF/DMR-1708929, NSF/DMR-1644779]
- US Department of Energy (DOE), Office of Science, Basic Energy Sciences [DE-SC0019275]
- NERSC supercomputing center through DOE [DE-AC02-05CH11231]
- Institute for Quantum Matter, an Energy Frontier Research Center - US Department of Energy, Office of Science, Basic Energy Sciences [DE-SC0019331]
- Gordon and Betty Moore Foundation under the EPIQS Program [GBMF9456]
- State of Florida
- US Department of Defense
- US State of Connecticut
- University of Connecticut's College for Liberal Arts and Sciences
- National Institute of Standards and Technology, US Department of Commerce
Research on novel electromagnetic responses such as the anomalous Hall effect in ferromagnetic Weyl semimetals shows promise. CeAlSi, a FM-WSM material, stands out for its noncentrosymmetric lattice, noncollinear FM ordering, and novel AHE that is anisotropic between the easy and hard magnetic axes. This material also exhibits large FM domains, offering potential for exploring device applications and the interplay between Weyl nodes and FM domain walls.
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 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.
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