Monopolar and dipolar relaxation in spin ice Ho2Ti2O7
The date of：
2021-06-17
viewed:
1
Ferromagnetically interacting Ising spins on the pyrochlore lattice of corner-sharing tetrahedra form a highly degenerate manifold of low-energy states. A spin flip relative to this “spin-ice” manifold can fractionalize into two oppositely charged magnetic monopoles with effective Coulomb interactions. To understand this process, we have probed the low-temperature magnetic response of spin ice to time-varying magnetic fields through stroboscopic neutron scattering and SQUID magnetometry on a new class of ultrapure Ho2Ti2O7 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.
Hot News
/
Related to recommend
2025
-
06
-
06
Click on the number of times:
1
来源：ACS PublicationsWe report the activity of transition metals (Fe, Co, and Ru) supported on CeO2 (CeO) and Gd-doped CeO2 (CeGdO) for ammonia synthesis. Compared with BM/CeO (BM = Fe + Co), the Ru/BM/...
2025
-
06
-
05
Click on the number of times:
0
Structural Transformations in Nickel-Doped Lanthanum-Based Electrocatalyst for Enhanced Oxygen Evolution Reaction 来源：ACS PublicationsMetal oxides are among the most promising electrocatalysts for...
2025
-
06
-
04
Click on the number of times:
0
Optimized Flux Single-Crystal Growth of the Quantum Spin Liquid Candidate NdTa7O19 and Other Rare-Earth Heptatantalates, ErTa7O19 and GdTa7O19 来源：ACS PublicationsSingle crystals are essential for...
2025
-
06
-
03
Click on the number of times:
0
Crystal Growth of Quaternary Rare Earth Selenosilicates by Using the Flux-Assisted Boron Chalcogen Mixture Method: Investigation of Their Magnetic and Optical Properties来源：ACS PublicationsA series of ...