The influence of magnetic dopants on the electronic structures of topological insulators (TIs) is a key factor for magnetic TIs-based spintronic application. Here we measured core level and valence band hard x-ray photoemission (HAXPES) spectra for (BiMn)2Te3 single crystals as a function of Mn doping to investigate the modification of the bulk band structures of Bi2Te3 by the dopants.
Recent developments point to a common, broken chiral symmetry nature of the charge orders in high-Tc cuprate superconductors. We have performed a temperature- and angle-dependent x-ray circular dichroism study on the charge-ordered prototype system La1.875Ba0.125CuO4 near the Cu K-edge. We found preliminary evidence for a broken chiral symmetry of the charge order in this system.