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
-
04
-
03
Click on the number of times:
0
Synthesis of Mixed Anion Rare Earth Sulfate Fluorides LnSO4F·H2O (Ln = Nd, Tb, Dy, and Ho) and LnSO4F (Ln = Tb, Dy, and Ho) source:ACSPublicationSingle crystals of the mixed anion rare earth...
2025
-
04
-
02
Click on the number of times:
0
source:SMALL CAPSAlligator Energy (ASX: AGE) has identified multiple uranium anomalies and some rare earth potential in analysis of results from its 2024 exploration program in the Alligator Rivers ur...
2025
-
04
-
01
Click on the number of times:
0
source:Hebrew University of JerusalemResearchers have discovered an unexpected superconducting transition in extremely thin films of niobium diselenide (NbSe2). Publishing in Nature Communications, th...
2025
-
03
-
31
Click on the number of times:
0
source:resourceworldBrazilian Rare Earths Limited [ASX: BRE] reported results of exploration drilling at the Pelé Target 1 Project, located in Bahia, Brazil.The Pelé Project is hosted within...