Phys.org July 19, 2022
A team of researchers in the US (National Energy Research Laboratory, University of Colorado, University of Kentucky) selected a tetracenethiophene compound called TES TIPS-TT, which has a crystal structure in which all molecules share a common axis. Using time-resolved paramagnetic resonance spectroscopy they characterized the spin state of the electrons in the material. The observed spin sublevel populations are consistent with predictions from the JDE model, including preferential 5TT0 formation at z ‖ B0, with one caveat—two 5TT spin sublevels have little to no population. This may be due to crossings between the 5TT and 3TT manifolds in the field range investigated by TR-EPR, consistent with the intertriplet exchange energy determined by monitoring photoluminescence at varying magnetic fields. According to the researchers this level of control could lead to the generation of pure quantum states that are purely entangled, which has broad potential applications…read more. TECHNICAL ARTICLE
Single crystal of the novel quantum material discovered by the NREL-led team. Credit: Sean Parkin, University of Kentucky