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  1. No Access

    Article

    Many-body and correlation effects in semiconductors

    Solids consist of 1022–1023 particles per cubic centimetre, interacting through infinite-range Coulomb interactions. The linear response of a solid to a weak external perturbation is well described by the concept...

    D. S. Chemla, Jagdeep Shah in Nature (2001)

  2. No Access

    Article

    Towards Bose–Einstein condensation of excitons in potential traps

    An exciton is an electron–hole bound pair in a semiconductor. In the low-density limit, it is a composite Bose quasi-particle, akin to the hydrogen atom1. Just as in dilute atomic gases2,3, reducing the temperatu...

    L. V. Butov, C. W. Lai, A. L. Ivanov, A. C. Gossard, D. S. Chemla in Nature (2002)

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    Article

    Macroscopically ordered state in an exciton system

    There is a rich variety of quantum liquids—such as superconductors, liquid helium and atom Bose–Einstein condensates—that exhibit macroscopic coherence in the form of ordered arrays of vortices1,2,3,4. Experiment...

    L. V. Butov, A. C. Gossard, D. S. Chemla in Nature (2002)

  4. No Access

    Article

    Ultrafast terahertz probes of transient conducting and insulating phases in an electron–hole gas

    Many-body systems in nature exhibit complexity and self-organization arising from seemingly simple laws. For example, the long-range Coulomb interaction between electrical charges has a simple form, yet is res...

    R. A. Kaindl, M. A. Carnahan, D. Hägele, R. Lövenich, D. S. Chemla in Nature (2003)