Spatial-resolved X-ray photoelectron spectroscopy of Weyl semimetal NbAs

G.-F. Chen; G. H. Zhang; H. Ding; H. W. Liu; L. X. Zhao; P. Richard

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Spatial-resolved X-ray photoelectron spectroscopy of Weyl semimetal NbAs

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arxiv 1802.08978 v1 pith:PT5M34TI submitted 2018-02-25 cond-mat.mtrl-sci

H. W. Liu , G. H. Zhang , P. Richard , L. X. Zhao , G.-F. Chen , H. Ding This is my paper

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We utilized X-ray photoemission electron microscopy (XPEEM) and X-ray photoelectron spectroscopy (XPS) to investigate the crystal surface of Weyl semimetal NbAs. XPEEM images present white and black contrast in both the Nb 3d and As 3d core level spectra. Surface-sensitive XPS spectra indicate that the entire surface of the sample contains both surface states of Nb 3d and As 3d, in form of oxides, and bulk states of NbAs. Estimated atomic percentage values nNb/nAs suggest that the surface is Nb-rich and asymmetric for white and black areas.

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