Monopolar and dipolar relaxation in spin ice Ho <sub>2</sub> Ti <sub>2</sub> O <sub>7</sub>
Yishu Wang, T. Reeder, Y. Karaki, J. Kindervater, T. Halloran, N. Maliszewskyj, Yiming Qiu, J. A. Rodriguez, S. Gladchenko, S. M. Koohpayeh, S. Nakatsuji, C. Broholm
Abstract
crystals. Covering almost 10 decades of time scales with atomic-scale spatial resolution, the experiments resolve apparent discrepancies between prior measurements on more disordered crystals and reveal a thermal crossover between distinct relaxation processes. Magnetic relaxation at low temperatures is associated with monopole motion through the spin-ice vacuum, while at elevated temperatures, relaxation occurs through reorientation of increasingly spin-like monopolar bound states. Spin fractionalization is thus directly manifest in the relaxation dynamics of spin ice.
Topics & Concepts
Condensed matter physicsSpin iceSpinsPhysicsRelaxation (psychology)MagnetometerSpin (aerodynamics)DipoleDegenerate energy levelsNeutron scatteringSpin polarizationIsing modelAntiferromagnetismMagnetic dipoleMagnetic fieldNanomagnetPhase diagramMagnetismSpin–lattice relaxationMaterials scienceMagnetizationThermal fluctuationsScatteringLattice (music)Magnetic structureAdvanced Condensed Matter PhysicsPhysics of Superconductivity and MagnetismIron-based superconductors research