There has been investigated the influence of γ-radiation on absorption spectra in energy range 1÷6.5 eV and temperature dependence of 90Bi2Te3-10Bi2Se3 film conductivity of p-and n-types conductivity within 1÷5 eV. It is established that γ-irradiation of films with intensity ρ=1.384 rad/sec brings about the formation of temporary lattice defects. DOI: 10.4018/ijcce.2013010101 2 International Jo...

Topological magnets are a new family of quantum materials providing great potential to realize emergent phenomena, such as the anomalous Hall effect and axion-insulator state. Here, we present our discovery that stoichiometric ferromagnet MnBi8Te13 with natural heterostructure MnBi2Te4/(Bi2Te3)3 is an unprecedented “half-magnetic topological insulator,” magnetization existing at MnBi2Te4 surfac...

When the three-dimensional topological insulators Bi2Se3 and Bi2Te3 have an interface with vacuum, i.e., a surface, they show remarkable features such as topologically protected and spin-momentum locked surface states. However, for practical applications, one often requires multiple interfaces or channels rather than a single surface. Here, for the first time, we show that an interfacial and id...

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Superlattice material technologies in the Bi2Te3-material system can potentially enable efficient micro-scale thermoelectric devices for energy harvesting and active site-specific thermal management from ~200K to ~400K. The state-of-the-art in these thin film materials and the state of transition of these materials into device prototypes are presented. In the energy harvesting area, early resul...

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Bismuth telluride (Bi2Te3) nano particles were prepared by refluxing method in different conditions such as varying concentration of KOH and reaction timings. X-ray diffraction (XRD) and transmission electron microscopy (TEM) measurements have been performed for structural and phase formation studies. The nanoparticles are showing the same structure of bulk except broadening of peak confirmed b...