Field and current control of the electrical conductivity of an artificial two-dimensional honeycomb lattice

ORAL

Abstract

The conductivity of a neodymium-based artificial honeycomb lattice undergoes dramatic changes upon application of magnetic fields and currents. We attribute these changes to a redistribution of magnetic charges that are formed at the vertices of the honeycomb due to the non-vanishing net flux of magnetization from adjacent magnetic elements. We suggest that the application of a large magnetic field or a current causes a transition from a disordered state, in which magnetic charges are distributed at random, to an ordered state, in which they are regularly arranged on the sites of two interpenetrating triangular Wigner crystals.

*The research at MU is supported by DOE, Office of Basic Energy Sciences under grant no. DE-SC0014461.

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Presenters

  • Yiyao Chen

    • Department of Physics and Astronomy, University of Missouri

Authors

  • Yiyao Chen

    • Department of Physics and Astronomy, University of Missouri

  • Brock T Summers

    • Department of Physics and Astronomy, University of Missouri

  • Ashutosh Dahal

    • Department of Physics and Astronomy, University of Missouri

  • Valeria Lauter

    • Neutron Scattering Division, Neutron Sciences Directorate, Oak Ridge National Laboratory

  • Giovanni Vignale

    • University of Missouri
    • Department of Physics and Astronomy, University of Missouri
    • University of Missouri (USA) & Yale-NUS College (Singapore)

  • Deepak K Singh

    • Department of Physics and Astronomy, University of Missouri