Final answer:
High-temperature superconductors exhibit superconductivity at elevated temperatures above a few kelvin, with critical temperatures that determine their superconducting properties.
Explanation:
High-temperature superconductors are materials that exhibit superconductivity at temperatures well above a few kelvin, with a critical temperature denoted as Te. Some high-temperature superconductors have verified Te values above 125K, indicating their ability to conduct electricity without resistance at higher temperatures. For instance, there are reports of superconductors with Te reaching as high as 250K, exemplifying their potential in various applications.
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