Universal Dynamics of Magnetic Monopoles in Two-Dimensional Kagomé 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 χ(ω) in the two-dimensional (2D) spin ice (so-called kagomé ice) of Dy2Ti2O7 shows a single scaling form. This behavior can be understood...
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| Veröffentlicht in: | Journal of the Physical Society of Japan 2021-12, Vol.90 (12), p.1 |
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| creator | Takatsu, Hiroshi Goto, Kazuki Sato, Taku J. Lynn, Jeffrey W. Matsubayashi, Kazuyuki Uwatoko, Yoshiya Higashinaka, Ryuji Matsuhira, Kazuyuki Hiroi, Zenji Kadowaki, Hiroaki |
| description | A magnetic monopole in spin ice is a novel quasiparticle excitation in condensed matter physics. We found that the ac frequency dependent magnetic susceptibility χ(ω) in the two-dimensional (2D) spin ice (so-called kagomé 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 ξ (∝1/√ω1), where ω1 is a characteristic frequency proportional to the peak position of the imaginary part of χ(ω). 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. |
| doi_str_mv | 10.7566/JPSJ.90.123705 |
| format | Article |
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We found that the ac frequency dependent magnetic susceptibility χ(ω) in the two-dimensional (2D) spin ice (so-called kagomé 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 ξ (∝1/√ω1), where ω1 is a characteristic frequency proportional to the peak position of the imaginary part of χ(ω). 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We found that the ac frequency dependent magnetic susceptibility χ(ω) in the two-dimensional (2D) spin ice (so-called kagomé 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 ξ (∝1/√ω1), where ω1 is a characteristic frequency proportional to the peak position of the imaginary part of χ(ω). 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| subjects | Condensed matter physics Elementary excitations Magnetic monopoles Magnetic permeability Magnets Scaling laws Spin ice Superconductors Two dimensional models |
| title | Universal Dynamics of Magnetic Monopoles in Two-Dimensional Kagomé Ice |
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