A new noncollinear ferromagnetic Weyl semimetal with anisotropic anomalous Hall effect
| Autor: | Bahadur Singh, David Graf, Bochao Xu, Arun Bansil, Christina Hoffman, Cheng-Yi Huang, Hsin Lin, Yang Zhao, Darius H. Torchinsky, Fazel Tafti, Collin Broholm, Jonathan Gaudet, Wei-Chi Chiu, Shin-Ming Huang, Baozhu Lu, Baokai Wang, Faranak Bahrami, Ilya Sochnikov, Hung-Yu Yang, Jacob Franklin, Guangyong Xu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Magnetic domain
Weyl semimetal FOS: Physical sciences 02 engineering and technology 01 natural sciences symbols.namesake Condensed Matter::Materials Science Hall effect 0103 physical sciences Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 010306 general physics Anisotropy Physics Condensed Matter - Materials Science Condensed matter physics Condensed Matter - Mesoscale and Nanoscale Physics Fermi level Materials Science (cond-mat.mtrl-sci) 021001 nanoscience & nanotechnology Semimetal 3. Good health Ferromagnetism symbols Condensed Matter::Strongly Correlated Electrons 0210 nano-technology Fermi Gamma-ray Space Telescope |
| Popis: | A developing frontier in condensed matter physics is the emergence of novel electromagnetic responses, such as topological and anomalous Hall effect (AHE), in ferromagnetic Weyl semimetals (FM-WSMs). Candidates of FM-WSM are limited to materials that preserve inversion symmetry and generate Weyl crossings by breaking 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, where the Weyl nodes are stabilized by breaking inversion symmetry, but their positions are tuned by breaking 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-axes. It also exhibits large FM domains that are promising for both device applications and an interplay between the Weyl nodes and FM domain walls. Preprint, 20 pages, 4 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|