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19 April 2024 |
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Article overview
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Berry-phase switch in electrostatically-confined topological surface states | | Jun Zhang
; Ye-ping Jiang
; Xu-Cun Ma
; Qi-Kun Xue
; | | Date: |
3 Mar 2022 | | Abstract: | Here we visualize the trapping of topological surface states in the circular
n-p junctions on the top surface of the 7-quintuple-layer three dimensional
(3D) topological insulator (TI) Sb2Te3 epitaxial films. As shown by spatially-
and field-dependent tunneling spectra, these trapped resonances show
field-induced splittings between the degenerate time-reversal-symmetric states
at zero magnetic field. These behaviors are attributed unambiguously to
Berry-phase switch by comparing the experimental data with both numerical and
semi-classical simulations. The successful electrostatic trapping of
topological surface states in epitaxial films and the observation of
Berry-phase switch provide a rich platform of exploiting new ideas for TI-based
quantum devices. | | Source: | arXiv, 2203.01759 | | Services: | Forum | Review | PDF | Favorites | |
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