Universal Dynamics of Magnetic Monopoles in Two-Dimensional Kagome Ice

A magnetic monopole in spin ice is a novel quasiparticle excitation in condensed matter physics. We found that the ac frequency dependent magnetic susceptibility chi(omega) in the two-dimensional (2D) spin ice (so-called kagome ice) of Dy2Ti2O7 shows a single scaling form. This behavior can be understood in terms of the dynamical scaling law for 2D Coulomb gas (CG) systems [Phys. Rev. B 90, 144428 (2014)], characterized by the charge correlation length xi (alpha 1/ffiffiffiffiffi ), where omega 1 is a characteristic frequency proportional to the peak position of the imaginary part of chi(omega). It is a generic behavior among a wide variety of models such as the vortex dynamics of 2D superconductors, 2D superfluids, classical XY magnets, and dynamics of melting of Wigner crystals.

Automated summary

The study discovered a novel quasiparticle excitation in spin ice called a magnetic monopole, characterized by a single scaling form in the ac frequency dependent magnetic susceptibility of 2D spin ice. This behavior can be explained by the dynamical scaling law for 2D Coulomb gas systems and is a common feature among various models such as 2D superconductors, 2D superfluids, classical XY magnets, and dynamics of melting of Wigner crystals.