Quantum droplets of electrons and holes

@article{AlmandHunter2014QuantumDO,
  title={Quantum droplets of electrons and holes},
  author={Andrew E. Almand-Hunter and H. Li and Steven T. Cundiff and Martin Mootz and M. Kira and Stephan W. Koch},
  journal={Nature},
  year={2014},
  volume={506},
  pages={471-475}
}
Interacting many-body systems are characterized by stable configurations of objects—ranging from elementary particles to cosmological formations—that also act as building blocks for more complicated structures. It is often possible to incorporate interactions in theoretical treatments of crystalline solids by introducing suitable quasiparticles that have an effective mass, spin or charge which in turn affects the material’s conductivity, optical response or phase transitions. Additional… 
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