Signatures for half-metallicity and nontrivial surface states in the kagome lattice Weyl semimetal Co3Sn2 S2
Jiao L, Xu Q, Cheon Y, Sun Y, Felser C, Liu E, Wirth S (2019)
Publication Type: Journal article
Publication year: 2019
Journal
Book Volume: 99
Article Number: 245158
Journal Issue: 24
DOI: 10.1103/PhysRevB.99.245158
Abstract
Weyl semimetals with time-reversal symmetry breaking are expected to show various fascinating physical behaviors, such as intrinsic giant anomalous Hall effect, chiral anomaly effect in the bulks, and Fermi arcs on the surfaces. Here we report a scanning tunneling microscopy study on the magnetic Weyl semimetal candidate Co3Sn2S2. According to the morphology and local density of states of the surface, we provide assignments to different surface terminations. The measured local density of states reveals a semimetal gap of ∼300 mV, which is further verified as the gap in spin-minority bands using spin-resolved tunneling spectra. Additionally, signature for the nontrivial surface states around 50 mV is proposed. This is further confirmed by the observations of standing waves around a step edge of the sample. Our observations and their comparison with band-structure calculations provide direct yet timely evidence for the bulk and surface band structures of the magnetic Weyl semimetal candidate Co3Sn2S2.
Involved external institutions
Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids
Germany (DE)
Chinese Academy of Sciences (CAS) / 中国科学院
China (CN)
Germany (DE)
Chinese Academy of Sciences (CAS) / 中国科学院
China (CN)
How to cite
APA:
Jiao, L., Xu, Q., Cheon, Y., Sun, Y., Felser, C., Liu, E., & Wirth, S. (2019). Signatures for half-metallicity and nontrivial surface states in the kagome lattice Weyl semimetal Co3Sn2 S2. Physical Review B, 99(24). https://doi.org/10.1103/PhysRevB.99.245158
MLA:
Jiao, Lin, et al. "Signatures for half-metallicity and nontrivial surface states in the kagome lattice Weyl semimetal Co3Sn2 S2." Physical Review B 99.24 (2019).
BibTeX: Download