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Showing 1–8 of 8 results
Advanced filters: Author: Massimo Rontani Clear advanced filters

  • Tunnelling and capacitance spectroscopies are able to image the wavefunctions of electrons in atom-like solid-state systems as they are shaped by an external magnetic field.

    • Massimo Rontani
    News & Views
    Nature Materials
    Volume: 10, P: 173-175

  • Exciton condensation has been observed in various three-dimensional (3D) materials. Now, monolayer WTe2—a 2D topological insulator—also shows the phenomenon. Strong electronic interactions allow the excitons to form and condense at high temperature.

    • Bosong Sun
    • Wenjin Zhao
    • David H. Cobden
    ResearchOpen Access
    Nature Physics
    Volume: 18, P: 94-99

  • It has long been anticipated theoretically that semiconductors with small band gaps may form a correlated exciton insulator phase, but it has been difficult to find material realisations. Here, the authors predict numerically that zero-gap armchair carbon nanotubes could be exciton insulators.

    • Daniele Varsano
    • Sandro Sorella
    • Massimo Rontani
    ResearchOpen Access
    Nature Communications
    Volume: 8, P: 1-9

  • The Stark effect can be used to address two qubits independently that are represented by semiconductor quantum dots, placed only a few nanometres apart.

    • Francesco Rossella
    • Andrea Bertoni
    • Stefano Roddaro
    Research
    Nature Nanotechnology
    Volume: 9, P: 997-1001

  • Four electrons in a semiconductor quantum dot exhibit similar correlation effects to those found in a molecule. Excitations of these electrons can be probed by inelastic light scattering, which reveals a decoupling of their rigid rotational motion from their spin excitations.

    • Sokratis Kalliakos
    • Massimo Rontani
    • Ken W. West
    Research
    Nature Physics
    Volume: 4, P: 467-471

  • Topological insulators have been studied primarily with regard to the behaviour of electrons. A theoretical study now shows that a single layer of a metal dichalcogenide can become a topological insulator for excitons.

    • Daniele Varsano
    • Maurizia Palummo
    • Massimo Rontani
    Research
    Nature Nanotechnology
    Volume: 15, P: 367-372

  • Here, the authors investigate the optical response of bulk black phosphorus to mid-infrared pulses, and find that while above-gap excitation leads to a broadband light-induced transparency, sub-gap pulses drive an anomalous response, peaked at the single-layer exciton resonance.

    • Angela Montanaro
    • Francesca Giusti
    • Daniele Fausti
    ResearchOpen Access
    Nature Communications
    Volume: 13, P: 1-7