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Effect of magnetization generated by synchrotron or laser radiation in magnetically-doped and pristine topological insulators (TIs) is presented and analyzed using angle-resolved photoemission spectroscopy. It was found that non-equal photoexcitation of the Dirac cone (DC) states with opposite momenta and spin orientation indicated by the asymmetry in photoemission intensity of the DC states is accompanied by the  k  || -shift of the DC states relative to the non-spin-polarized conduction band states located at  k  ||  = 0. We relate the observed  k  || -shift to the induced surface in-plane magnetic field and corresponding magnetization due to the spin accumulation. The direction of the DC  k  || -shift and its value are changed with photon energy in correlation with variation of the sign and magnitude of the DC states intensity asymmetry. The theoretical estimations describe well the effect and predict the DC  k  || -shift values which corroborate the experimental observations. This finding opens new perspectives for effective local magnetization manipulation.

Dirac cone intensity asymmetry and surface magnetic field in V-doped and pristine topological insulators generated by synchrotron and laser radiation