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Showing 1–15 of 15 results
Advanced filters: Author: L. V. Butov Clear advanced filters

  • Indirect excitons, composed of a spatially separated electron and hole, could find applications in excitonic devices for signal processing and communication, however they are normally detected at low temperatures. Here, the authors observe room-temperature indirect excitons in van der Waals transition metal dichalcogenide heterostructures.

    • E. V. Calman
    • M. M. Fogler
    • A. K. Geim
    ResearchOpen Access
    Nature Communications
    Volume: 9, P: 1-5

  • Spatial distribution of the photoluminescence of interlayer excitons in van der Waals heterostructures comprising MoSe2 and WSe2 monolayers and encapsulated in rather thick hexagonal boron nitride is investigated, revealing interlayer exciton long-range transport with 1/e decay distances reaching and exceeding 100 μm.

    • L. H. Fowler-Gerace
    • Zhiwen Zhou
    • L. V. Butov
    Research
    Nature Photonics
    Volume: 18, P: 823-828

  • The realization of cold and dense electron–hole systems by optical excitation is hindered by the heating caused by particle recombination. Now, cold and dense electron–hole systems have been observed in heterostructures with separated electron and hole layers.

    • D. J. Choksy
    • E. A. Szwed
    • L. N. Pfeiffer
    Research
    Nature Physics
    Volume: 19, P: 1275-1279

  • Geometric phases in matter are of fundamental interest. Here the authors observe the Pancharatnam–Berry phase in matter waves by imaging light interference patterns from cold gases of indirect excitons and find long-range coherent spin transport in the system.

    • J. R. Leonard
    • A. A. High
    • A. C. Gossard
    ResearchOpen Access
    Nature Communications
    Volume: 9, P: 1-5

  • Superfluidity typically occurs at cryogenic temperatures. But Fogler et al. predict that an excitonic superfluid could emerge at much higher temperatures, perhaps even approaching room temperature, in a heterostructure of atomically thin layers of molybdenum disulphide and hexagonal boron nitride.

    • M. M. Fogler
    • L. V. Butov
    • K. S. Novoselov
    Research
    Nature Communications
    Volume: 5, P: 1-5

  • Previous interference experiments on indirect excitons found dislocation-like phase singularities that could not be explained by common phase defects. Here, the authors explain these features in terms of the moiré pattern of interference of condensate matter waves propagating over macroscopic distances.

    • J. R. Leonard
    • Lunhui Hu
    • A. C. Gossard
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-6

  • Exciton optoelectronic devices have been demonstrated previously at an operating temperature of 1.5 K. Here, experimental proof-of-principle for excitonic switching devices at approximately 100 K is demonstrated. Excitonic devices promise high operation speed and optoelectronic integration in compact dimensions.

    • G. Grosso
    • J. Graves
    • A. C. Gossard
    Research
    Nature Photonics
    Volume: 3, P: 577-580

  • In theory, excitons can form a coherent state like a Bose–Einstein condensate, but this is difficult to produce; it is now shown that spontaneous coherence, characteristic of a condensate, can occur in a cold exciton gas.

    • A. A. High
    • J. R. Leonard
    • A. C. Gossard
    Research
    Nature
    Volume: 483, P: 584-588

  • Exciton–polaritons, resulting from the light–matter coupling between an exciton and a photon in a cavity, form Bose–Einstein-like condensates above a critical density. Various aspects of the physics of exciton–polariton condensates are now reviewed.

    • Tim Byrnes
    • Na Young Kim
    • Yoshihisa Yamamoto
    Reviews
    Nature Physics
    Volume: 10, P: 803-813