2014年2月27日 Nature

nero1981

  2014年2月27日 Nature
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; I7 s$ i# @$ k3 u0 fExcitons, 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.); A4 P5 k' n) {# S' X+ l0 O+ _
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