analiza aiqbench
This study identifies a hidden density-wave instability in the ruthenate Ba$_4$Ru$_3$O$_{10}$, revealing a rare correlated system where electronic reconstruction and antiferromagnetism coexist without magnetic field sensitivity. The discovery of simultaneous nonlinear transport signatures, such as negative differential resistance and slow collective dynamics, at low temperatures suggests a strongly pinned collective electronic state intrinsic to the material rather than an extrinsic artifact. Such findings provide critical insights into the interplay between lattice, thermodynamic, and magnetic properties in strongly correlated oxides, advancing the fundamental understanding of quantum materials.
Hidden Density-Wave Instability in the Trimer Ruthenate Ba$_4$Ru$_3$O$_{10}$
arXiv:2602.13443v2 Announce Type: replace-cross Abstract: We report a hidden density-wave instability in the trimer-based ruthenate Ba4Ru3O10, previously regarded as a pure antiferromagnet with a phase transition at TA=100 K. This transition is manifested in lattice parameters, transport, thermodynamics, and magnetic susceptibility, yet remains remarkably insensitive to magnetic fields up to at least 14 T, indicating an electronically driven reconstruction. At much lower temperatures T*= 20 K, charge transport becomes strongly nonlinear, exhibiting distinct depinning thresholds, negative differential resistance, pronounced current- and frequency-dependence, and slow collective dynamics in the Hertz range. While each feature is characteristic of density-wave transport, their simultaneous occurrence in an antiferromagnetic oxide is unprecedented. All nonlinear signatures vanish upon only 3% Ir substitution, which preserves the crystal structure and insulating state, ruling out Joule heating or extrinsic artifacts. The wide separation between the electronic reconstruction at TA and the emergence of nonlinear dynamics at T* identifies Ba4Ru3O10 as a rare correlated system hosting a strongly pinned collective electronic state intertwined with antiferromagnetism.
Authors:Gang Cao, Hengdi Zhao, Adrienne Bond, Tristan R. Cao, Gabriel Schebel, Arabella Quane, Yifei Ni, Yu Zhang, Logan Wall, Rahul Nandkishore, Pedro Schlottmann, Feng Ye
Abstract:We report a hidden density-wave instability in the trimer-based ruthenate Ba4Ru3O10, previously regarded as a pure antiferromagnet with a phase transition at TA=100 K. This transition is manifested in lattice parameters, transport, thermodynamics, and magnetic susceptibility, yet remains remarkably insensitive to magnetic fields up to at least 14 T, indicating an electronically driven reconstruction. At much lower temperatures T*= 20 K, charge transport becomes strongly nonlinear, exhibiting distinct depinning thresholds, negative differential resistance, pronounced current- and frequency-dependence, and slow collective dynamics in the Hertz range. While each feature is characteristic of density-wave transport, their simultaneous occurrence in an antiferromagnetic oxide is unprecedented. All nonlinear signatures vanish upon only 3% Ir substitution, which preserves the crystal structure and insulating state, ruling out Joule heating or extrinsic artifacts. The wide separation between the electronic reconstruction at TA and the emergence of nonlinear dynamics at T* identifies Ba4Ru3O10 as a rare correlated system hosting a strongly pinned collective electronic state intertwined with antiferromagnetism.
Strongly Correlated Electrons (cond-mat.str-el); Quantum Physics (quant-ph)
arXiv:2602.13443 [cond-mat.str-el]
(or arXiv:2602.13443v2 [cond-mat.str-el] for this version)
Text integral sub licența deschisă a publicației · 200 cuvinte