Tin telluride Tin telluride Tin telluride is a compound of tin and tellurium (SnTe); is a IV-VI narrow band gap semiconductor and has direct band gap of 0.18 eV. It is often alloyed with lead to make lead tin telluride, which is used as an infrared detector material. Tin telluride normally forms p-type semiconductor (Extrinsic semiconductor) due to tin vacancies and is a low temperature superconductor. SnTe exists in 3 crystal phases. At Low temperatures, where the concentration of hole carriers is less than 1.5x10 cm , Tin Telluride exists in rhombohedral phase also known as α-SnTe. At room temperature and atmospheric
Wedding ducks Wedding ducks Wedding ducks () are a pair of duck carvings (traditionally Mandarin ducks) that are used in Korean wedding ceremonies, and often given as marriage gifts. Mandarin ducks are chosen because it is believed that, unlike other types of ducks, they mate for life, and that if one of the pair dies, the other will mourn. For Koreans, Mandarin ducks represent peace, fidelity, and plentiful offspring. Originally, a man who wished to marry would purchase pairs of live ducks or geese to give as a gift to the family of the prospective bride. That tradition gave way to using