A miniature diamond anvil cell (DAC) of overall dimensions φ10×24 mm made of nonmagnetic NiCrAl alloy is described. A new design permits the alignment of anvil flats as perfectly as in traditional DACs. A lever-arm assembly and a fiber-optical system for the cell are described. Two example of experimental results obtained with the cell are given, namely the pressure dependence of the refractive index of diamond and the pressure-induced shifts in the photoluminescence peaks of a quantum well sample. A maximum pressure of 110 GPa was reached with beveled anvils.
The authors have developed a high pressure method to produce bulk chalcogenide glasses of a unique AsS composition. The structure, optical properties, and stability of the obtained glasses have been studied. Glasses have an intrinsic deep-red color, optical pseudogap Eg≈1.75eV, a broad Urbach absorption tail WU≈120meV, and high temperature stability up to 130°C. AsS glasses show photoinduced transformations, including photocrystallization. The glass structure is largely based on the quasimolecular As4S4 units with partial polymerization providing an example of an inorganic molecular-based glass.
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