2014年2月27日 Nature . c8 o# x. `! F" y& z 6 T T8 c) O7 o! f! K1 X5 mExcitons, plasmons and phonons are some of the better known quasiparticles — exotic entities that act in some respects like ordinary particles. New types do not come along all that often but here is one — a fundamentally new many-body particle named the ‘dropleton‘. Mackillo Kira and colleagues have identified this new quantum entity, a quantum droplet created when four or more electrons and holes (electronic vacancies) form a tiny correlation bubble via the Coulomb attraction, in direct-gap semiconductors such as gallium arsenide. The cover illustrates the pair-correlation function g(r) of quantum droplets — the central peak of the correlation function shows that electrons and holes are likely to be co-located and the ripples show that otherwise they form regularly spaced shells. (Cover art: Brad Baxley.) 2 T2 R4 V$ F: a) L- p0 R 0 b6 Z* H3 M/ w作者: 千细胞 时间: 2014-3-3 13:38
