4 ms·
Article at the university's site: https://physics.illinois.edu/news/article/24114 https://physics.illinois.edu/news/article/24114
by buovjaga 9y ago
Article at the university's site: https://physics.illinois.edu/news/article/24114 https://physics.illinois.edu/news/article/24114
- Koshkin 9y agoMost useful link, thanks. So, the idea seems to be that an electron that has crossed ("excited") into the conduction band may, instead of recombining with a hole it (or some other electron) left behind, it may, as the article puts it, "pair up" with the hole and thus form a bosonic quasi-particle. One of the interesting aspects of this is that unlike Cooper pairing (of two electrons), the pairing of an electron with a hole is a collective effect, i.e. one that requires the participation of many electrons (as well as the atom's nucleus that accounts for the hole's positive charge). Those who want to learn more about "collective electrodynamics" may consult a book by Carver Mead.
- sctb 9y agoThanks! We've updated the link from https://m.phys.org/news/2017-12-physicists-discovery-excitonium.html https://m.phys.org/news/2017-12-physicists-discovery-exciton....