AWhat changed
Two independent experiments reported low-temperature second-order electrical responses in even-layer antiferromagnetic MnBi2Te4 whose signs reverse with prepared antiferromagnetic order. Gao and colleagues engineered black-phosphorus interfaces and supported a predominantly nonlinear Hall response through symmetry, conductivity scaling and frequency-mixing controls. Wang and colleagues measured transverse and longitudinal nonlinear responses in four- and six-layer devices, including current-direction-dependent DC resistance. Their models attribute major contributions to energy-weighted quantum-metric geometry.
Scientific scope
Two independent experiments reported low-temperature second-order electrical responses in even-layer antiferromagnetic MnBi2Te4 whose signs reverse with prepared antiferromagnetic order. Gao and colleagues engineered black-phosphorus interfaces and supported a predominantly nonlinear Hall response through symmetry, conductivity scaling and frequency-mixing controls. Wang and colleagues measured transverse and longitudinal nonlinear responses in four- and six-layer devices, including current-direction-dependent DC resistance. Their models attribute major contributions to energy-weighted quantum-metric geometry. The two sample platforms, tensor decompositions and carrier-sign patterns are distinct. Mechanism attribution relies on symmetry, low-temperature scaling and electronic models; it is not a direct reconstruction of the entire quantum metric or a universal exclusion of disorder and artifacts. The corrected journal article and the preprint supplementary material differ; further journal supplementary material may affect the details. Microwave rectification does not establish uniquely intrinsic mechanism or usable energy-conversion efficiency. No room-temperature, terahertz, lossless-current or device-deployment claim is established.
Evidence
The linked original works support the scoped statement and contribution attribution. WRS has not independently replayed experiments or reconstructed a full mathematical proof. The two sample platforms, tensor decompositions and carrier-sign patterns are distinct. Mechanism attribution relies on symmetry, low-temperature scaling and electronic models; it is not a direct reconstruction of the entire quantum metric or a universal exclusion of disorder and artifacts. The corrected journal article and the preprint supplementary material differ; further journal supplementary material may affect the details. Microwave rectification does not establish uniquely intrinsic mechanism or usable energy-conversion efficiency. No room-temperature, terahertz, lossless-current or device-deployment claim is established.
Contributors
- The named authors in the research record · SCIENCE: These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged.
- Quantum metric nonlinear Hall effect in a topological antiferromagnetic heterostructure (arXiv2306.09575v2)
- Quantum metric nonlinear Hall effect in a topological antiferromagnetic heterostructure (corrected Science formal body)
- Quantum metric induced nonlinear transport in a topological antiferromagnet (arXiv2306.09285v2)
Provisional WRS assessment, edition 2026-10-28.1. Independent expert calibration is pending. This grade does not certify correctness or assign ownership.
Full scientific record · Browse contribution grades · Request a correction