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Jahn–Teller effect
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<p>The Jahn–Teller effect (JT effect or JTE) is an important mechanism of <a href="/facts/Spontaneous_symmetry_breaking/VmXqNLlo">spontaneous symmetry breaking</a> in molecular and solid-state systems which has far-reaching consequences in different fields, and is responsible for a variety of phenomena in <a href="/facts/Spectroscopy/mj71FuNK">spectroscopy</a>, <a href="/facts/Stereochemistry/XkcRVNwd">stereochemistry</a>, <a href="/facts/Crystal_chemistry/zGPrTrYE">crystal chemistry</a>, molecular and <a href="/facts/Solid-state_physics/Cmc6hvyR">solid-state physics</a>, and <a href="/facts/Materials_science/N5HrXRYW">materials science</a>. The effect is named for <a href="/facts/Hermann_Arthur_Jahn/jlgaYqoH">Hermann Arthur Jahn</a> and <a href="/facts/Edward_Teller/9g3Mr9Mp">Edward Teller</a>, who first reported studies about it in 1937. </p>