A room-temperature superconductor is material yet to be discovered which would be capable of exhibiting superconducting properties at temperatures above 0° C (273.15 K). This is of course not strictly speaking "room temperature" (20–25° C), however it can be reached very cheaply even for large machines (for example, meat closets reach this temperature). A magnet levitating above a high-temperature superconductor, cooled with liquid nitrogen. ... Fig. ... Celsius is, or relates to, the Celsius temperature scale (previously known as the centigrade scale). ... The Kelvin scale is a thermodynamic (absolute) temperature scale where absolute zero—the lowest possible temperature where nothing could be colder and no heat energy remains in a substance—is defined as zero kelvin (0 K). ...
Since the discovery of high-temperature superconductors, several materials have been claimed as being room-temperature superconductors. In every case, independent investigation has quickly proven these claims false. As a result, most condensed matter physicists now welcome with extreme skepticism any further claims of this nature. Unsolved problems in physics: Why do certain materials exhibit superconductivity at temperatures much higher than 50 kelvins? The term high-temperature superconductor was initially employed to designate the new family of cuprate-perovskite ceramic materials discovered by J.G. Bednorz and K.A. Müller in 1986. ... Condensed matter physics is the field of physics that deals with the macroscopic physical properties of matter. ... For the Finnish funeral doom metal band, see Skepticism (band). ...
As of 2006, the highest-temperature superconductor (at ambient pressure) is mercury thallium barium calcium copper oxide (Hg0.8Tl0.2Ba2Ca2Cu3O8.33), at 138 K, though there are claims that this can be raised to 164 K by applying high pressure to the superconductor. 2006 is a common year starting on Sunday of the Gregorian calendar. ...
More information on this subject can be found here: http://xxx.lanl.gov/ftp/cond-mat/papers/0606/0606187.pdf .
In conventional superconductors, superconductivity is caused by a force of attraction between certain conduction electrons arising from the exchange of phonons, which causes the conduction electrons to exhibit a superfluid phase composed of correlated pairs of electrons.
Superconductors are also able to maintain a current with no applied voltage whatsoever, a property exploited in superconducting electromagnets such as those found in MRI machines.
In a class of superconductors known as type II superconductors (including all known high-temperature superconductors), an extremely small amount of resistivity appears when an electrical current is applied in conjunction with a strong magnetic field (which may be caused by the electrical current).
A roomtemperaturesuperconductor is material yet to be discovered which would be capable of exhibiting superconducting properties at temperatures above 0°C (273.15 K).
This is of course not strictly speaking "roomtemperature" (20–25°C), however it can be reached very cheaply even for large machines (for example, meat closets reach this temperature).
Since the discovery of high-temperature superconductors, several materials have been claimed as being room-temperature superconductors.
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