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- W4220762829 abstract "Abstract The Dirac point of a topological surface state (TSS) is protected against gapping by time-reversal symmetry. Conventional wisdom stipulates, therefore, that only through magnetisation may a TSS become gapped. However, non-magnetic gaps have now been demonstrated in Bi 2 Se 3 systems doped with Mn or In, explained by hybridisation of the Dirac cone with induced impurity resonances. Recent photoemission experiments suggest that an analogous mechanism applies even when Bi 2 Se 3 is surface dosed with Au. Here, we perform a systematic spin- and angle-resolved photoemission study of Au-dosed Bi 2 Se 3 . Although there are experimental conditions wherein the TSS appears gapped due to unfavourable photoemission matrix elements, our photon-energy-dependent spectra unambiguously demonstrate the robustness of the Dirac cone against high Au coverage. We further show how the spin textures of the TSS and its accompanying surface resonances remain qualitatively unchanged following Au deposition, and discuss the mechanism underlying the suppression of the spectral weight." @default.
- W4220762829 created "2022-04-03" @default.
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- W4220762829 date "2022-03-28" @default.
- W4220762829 modified "2023-09-27" @default.
- W4220762829 title "Robust behavior and spin-texture stability of the topological surface state in Bi2Se3 upon deposition of gold" @default.
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- W4220762829 doi "https://doi.org/10.1038/s41535-022-00443-9" @default.
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