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siddharth
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#3
Jun2-06, 10:35 AM
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High-Temperature superconductors, such as Yttrium Barium Copper Oxide, can become superconducting at temperatures which are significantly higher than 0 K.

The BCS Theory explains superconductivity in Type I superconductors.
"What causes high-temperature superconductivity?" is an open question in physics, isn't it?