Quantum frequency doubling in the topological insulator Bi2Se3
Name
s41467-021-20983-1.pdf
Description
Published version
Size
1.16 MB
Format
Adobe PDF
Checksum (MD5)
96d6d2dfc2a73b1810c2fd43be043a3a
Author(s)
He, Pan
Isobe, Hiroki
Zhu, Dapeng
Hsu, Chuang-Han
Fu, Liang
Yang, Hyunsoo
Date Issued
2021
Journal
Nature Communications
Publisher
Springer Science and Business Media LLC
Citation
He, Pan, Isobe, Hiroki, Zhu, Dapeng, Hsu, Chuang-Han, Fu, Liang et al. 2021. "Quantum frequency doubling in the topological insulator Bi2Se3." Nature Communications, 12 (1).
Version
Final published version
Abstract
© 2021, The Author(s). The nonlinear Hall effect due to Berry curvature dipole (BCD) induces frequency doubling, which was recently observed in time-reversal-invariant materials. Here we report novel electric frequency doubling in the absence of BCD on a surface of the topological insulator Bi2Se3 under zero magnetic field. We observe that the frequency-doubling voltage transverse to the applied ac current shows a threefold rotational symmetry, whereas it forbids BCD. One of the mechanisms compatible with the symmetry is skew scattering, arising from the inherent chirality of the topological surface state. We introduce the Berry curvature triple, a high-order moment of the Berry curvature, to explain skew scattering under the threefold rotational symmetry. Our work paves the way to obtain a giant second-order nonlinear electric effect in high mobility quantum materials, as the skew scattering surpasses other mechanisms in the clean limit.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1038/S41467-021-20983-1
