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Showing 1–7 of 7 results
Advanced filters: Author: P. Kumaravadivel Clear advanced filters

  • Magneto-oscillations have revealed many interesting phenomena in graphene and quantum Hall systems, but they are typically measured at low currents and in equilibrium. Here, the authors report several non-equilibrium quantum effects observed in magneto-oscillations in graphene at high currents.

    • M. T. Greenaway
    • P. Kumaravadivel
    • L. Eaves
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-6

  • Increasing the size of mesoscopic devices based on van der Waals heterostructures triggers additional quantum effects. Here, the authors observe distinct magnetoresistance oscillations in graphene/h-BN Hall bars only in devices wider than 10 μm due to resonant scattering of charge carriers by transverse acoustic phonons in graphene.

    • P. Kumaravadivel
    • M. T. Greenaway
    • R. Krishna Kumar
    ResearchOpen Access
    Nature Communications
    Volume: 10, P: 1-6

  • The conductivity of marginally-twisted bilayer graphene is predicted to persist in presence of a bandgap-opening interlayer bias, owing to a network of 1D conductive states at domain boundaries. Here, the authors report Aharonov–Bohm oscillations up to 100 K, whereas at liquid helium temperatures another kind of oscillation appears, due to progressive population of the narrow minibands formed by the 2D network of 1D states inside the gap.

    • S. G. Xu
    • A. I. Berdyugin
    • A. K. Geim
    ResearchOpen Access
    Nature Communications
    Volume: 10, P: 1-5

  • Graphene-based Hall magnetometers can be used to study the magnetization of two-dimensional ferromagnets.

    • M. Kim
    • P. Kumaravadivel
    • A. K. Geim
    Research
    Nature Electronics
    Volume: 2, P: 457-463

  • Experimental control of electron-electron interactions in materials is challenging. Here, the authors control the interactions by proximity screening with gate dielectrics of nanometer thickness, revealing qualitative changes in concentration and temperature dependences, and validating their analysis using electron hydrodynamics and umklapp scattering approaches.

    • M. Kim
    • S. G. Xu
    • A. K. Geim
    ResearchOpen Access
    Nature Communications
    Volume: 11, P: 1-6