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We report a high-yield synthesis of single-crystal hexagonal Sb2Te3 nanoplates using a solvothermal approach. The experimental results show that the concentration of capping agent CTAB played a key role in the formation of nanoplates. This new nanostructure may provide opportunity for the exploration of novel thermoelectric properties and have potential applications in thermoelectric nanodevices.

We study the Kondo alloy model on a square lattice using dynamical mean-field theory for Kondo substitution and disorder effects, together with static mean-field approximations. We computed and analyzed photoemission properties as a function of electronic filling nc, Kondo impurity concentration x, and strength of Kondo temperature TK. We provide a complete description of the angle resolved photoemission spectroscopy (ARPES) signals expected in the paramagnetic (PM) Kondo phases. By analyzing the Fermi surface (FS), we observe the Lifshitz-like transition predicted previously for strong TK at x = nc and we discuss the evolution of the dispersion from the dense coherent to the dilute Kondo regimes. At smaller TK, we find that this transition marking the breakdown of coherence at x = nc becomes a crossover. However, we identify another transition at a smaller concentration x⋆ where the effective mass continuously vanishes. x⋆ separates the one-branch and the two-branches ARPES dispersions characterizing respectively dilute and dense Kondo PM regimes. The x − TK phase diagrams are also described, suggesting that the transition at x⋆ might be experimentally observable since magnetically ordered phases are stabilized at much lower TK. FS reconstructions in antiferromagnetic and ferromagnetic phases are also discussed. [ABSTRACT FROM AUTHOR]