Electron transport properties in high-purity Ge down to cryogenic temperatures

Study of Secondary Electron Emission from Niobium at Cryogenic Temperatures

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Dielectric properties of PbNb2O6 ferroelectric ceramics at cryogenic temperatures

Evaporative cooling of antiprotons to cryogenic temperatures.

We report the application of evaporative cooling to clouds of trapped antiprotons, resulting in plasmas with measured temperature as low as 9 K. We have modeled the evaporation process for charged particles using appropriate rate equations. Good agreement between experiment and theory is observed, permitting prediction of cooling efficiency in future experiments. The technique opens up new poss...

Laser cooling of solids to cryogenic temperatures

Laser radiation has been used to cool matter ranging from dilute gases to micromechanical oscillators. In Doppler cooling of gases, the translational energy of atoms is lowered through interaction with a laser field1,2. Recently, cooling of a high-density gas through collisional redistribution of radiation has been demonstrated3. In laser cooling of solids, heat is removed through the annihilat...

High temperature electron transport properties in AlGaN/GaN heterostructures

Hall electron mobility H and sheet concentration ns in AlGaN/GaN heterostructures have been measured from 77 to 1020 K. The effect of the deposited Al2O3 layer is also investigated with varying its thickness. It is found that H decreases monotonously with the temperature T and its dependence is well approximated with the function of H=4.5 10 3 exp −0.004T in the temperatures over 350 K. The fun...