Probing Loop Currents and Collective Modes of Charge Density Waves in Kagome Materials with NV Centers
Year: 2025
Type: preprint
Abstract: Recently, the unconventional charge density wave (CDW) order with loop currents has attracted considerable attention in the Kagome material family AV$_3$Sb$_5$ (A = K, Rb, Cs). However, experimental signatures of loop current order remain elusive. In this work, based on the mean-field free energy, we analyze the collective modes of unconventional CDW order in a Kagome lattice model. Furthermore, we point out that phase modes in the imaginary CDW (iCDW) order with loop current orders result in time-dependent stray fields. We thus propose using nitrogen-vacancy (NV) centers to detect these time-dependent stray fields, providing a potential experimental approach to identifying loop current order.
Source: arXiv (Cornell University)
Authors: Xie, Ying-Ming, Nagaosa, Naoto
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W6979295904
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