Frustration-Assisted Electrical Switching in CoxTaS2
Abstract
Electrical switching in antiferromagnets is commonly described as the action of current-induced torques on a rigid order parameter. In frustrated magnets, however, competing states can create a history-dependent energy landscape in which slow collective dynamics actively participate in electrical reconfiguration. Here, we demonstrate frustration-assisted switching in near-stoichiometric CoxTaS2, a van der Waals antiferromagnet located at the composition-sensitive boundary between Hall-active and Hall-inactive multi-Q-related magnetic regimes. Although the crystals exhibit no resolved spontaneous Hall response, they retain van Hove singularities near the Fermi level and order antiferromagnetically below TN ≃ 31.5 K. Current pulses write nonvolatile anisotropic resistance states in microstructured devices, with an activation current density nearly an order of magnitude below that reported for the Hall-active lower-intercalation phase. The switching response separates into two temperature-dependent dynamical regimes rather than following a single current threshold. Independent magnetization-aging and post-field-relaxation measurements reveal slow, history-dependent magnetic dynamics, and the relaxation strength closely follows the inverse switching amplitude. These results identify magnetic frustration and glassy dynamics as central ingredients in the electrical reconfiguration of CoxTaS2, establishing a route to functional switching through a dynamically soft antiferromagnetic landscape.
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BibTeX
@misc{sterenberg2026frustrationassisted,
title = {{Frustration-Assisted Electrical Switching in $Co_xTaS_2$}},
author = {Matan Sterenberg and Bar Segura and Muntaser Naamneh and Eran Maniv},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.25112},
eprint = {2610.25112},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.25112},
}
RIS
TY - UNPB
TI - Frustration-Assisted Electrical Switching in Co_xTaS_2
AU - Matan Sterenberg
AU - Bar Segura
AU - Muntaser Naamneh
AU - Eran Maniv
PY - 2026
DA - 2026/10/18
PB - arXiv
DO - 10.48550/arxiv.2610.25112
UR - https://arxiv.org/abs/2610.25112
AB - Electrical switching in antiferromagnets is commonly described as the action of current-induced torques on a rigid order parameter. In frustrated magnets, however, competing states can create a history-dependent energy landscape in which slow collective dynamics actively participate in electrical reconfiguration. Here, we demonstrate frustration-assisted switching in near-stoichiometric Co_xTaS_2, a van der Waals antiferromagnet located at the composition-sensitive boundary between Hall-active and Hall-inactive multi-Q-related magnetic regimes. Although the crystals exhibit no resolved spontaneous Hall response, they retain van Hove singularities near the Fermi level and order antiferromagnetically below T_N ≃ 31.5 K. Current pulses write nonvolatile anisotropic resistance states in microstructured devices, with an activation current density nearly an order of magnitude below that reported for the Hall-active lower-intercalation phase. The switching response separates into two temperature-dependent dynamical regimes rather than following a single current threshold. Independent magnetization-aging and post-field-relaxation measurements reveal slow, history-dependent magnetic dynamics, and the relaxation strength closely follows the inverse switching amplitude. These results identify magnetic frustration and glassy dynamics as central ingredients in the electrical reconfiguration of Co_xTaS_2, establishing a route to functional switching through a dynamically soft antiferromagnetic landscape.
ER -