Angle-resolved photoemission spectroscopy measurements identify dark electron states in palladium diselenide, cuprate superconductors, and lead halide perovskites. These dark states are attributed to the two pairs of sublattices in each of the solids, which leads to a double two-level quantum system in which double destructive interference can occur.

中文翻译：

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具有两对亚晶格的固体中无法检测到的电子


角分辨光电子能谱测量可识别二硒化钯、铜酸盐超导体和卤化铅钙钛矿中的暗电子态。这些暗态归因于每个固体中的两对亚晶格，这导致了双两能级量子系统，其中可以发生双相消干涉。