Antiferromagnetism Induces Dissipationless Transverse Conductivity
© The Physical Society of Japan
This article is on
Intrinsic Anomalous Hall Effect Arising from Antiferromagnetic as Revealed by High-Quality NbMnP
(JPSJ Editors' Choice)
J. Phys. Soc. Jpn.
93,
063702
(2024)
.
An investigation using high-quality NbMnP crystals demonstrates that the anomalous Hall conductivity arising from antiferromagnetism is dissipationless, as expected from the intrinsic mechanism.
The anomalous Hall effect (AHE) is the Hall effect that emerges at zero magnetic fields. It was discovered in ferromagnets more than 100 years ago; however, its mechanism had long been controversial. In the 2000s, the band-structure effect, known as the intrinsic mechanism, was reconstructed based on the Berry phase concept. Many theoretical and experimental investigations revealed that the intrinsic mechanism contributes significantly to the AHE in ferromagnets. This is experimentally confirmed by observing the scattering dependence of the anomalous Hall conductivity (AHC), i.e., the transverse conductivity, because the intrinsic mechanism contributes to a dissipationless AHC, which is independent of scattering.
Meanwhile, the Berry phase concept clarifies that the AHE is not triggered by magnetization but by symmetry breaking. This resulted in the discovery of the prominent AHEs in antiferromagnetic (AF) materials. Several AF materials exhibiting the AHE have been discovered; however, a system that can offer high-quality crystals has not been discovered. The scattering dependence of the AHC arising from AF structures must be investigated.
In this study, high-quality crystals with large AHE arising from the AF structure were obtained in NbMnP using the Ga-flux method. Using high-quality NbMnP, we investigated the scattering dependence of the AHC against a wide range of electrical conductivities. Consequently, dissipationless AHC was experimentally confirmed for the AF material.
The prospective benefits of obtaining high-quality NbMnP are not limited to understanding the AHE. This AF material is expected to generate other ferromagnetic responses, such as the anomalous Nernst effect (ANE). Influence of disorder on the ANE has not been investigated comprehensively, including that for ferromagnets; thus, their impurity dependence must be elucidated. NbMnP is a suitable material for assessing the effect of impurities on ferromagnetic responses under the AF spin configuration.
(Written by Y. Arai on behalf of all authors.)
Intrinsic Anomalous Hall Effect Arising from Antiferromagnetic as Revealed by High-Quality NbMnP
(JPSJ Editors' Choice)
J. Phys. Soc. Jpn.
93,
063702
(2024)
.
Share this topic
Fields
Related Articles
-
Enhancing Accuracy and Reliability Bayesian Framework for Analysis of AR-HAXPES of Hard X-ray Photoelectron Spectroscopy
Dielectric, optical, and other properties in condensed matter
Electronic structure and electrical properties of surfaces and nanostructures
Measurement, instrumentation, and techniques
2026-4-28
We present a Bayesian framework for angle-resolved hard X-ray photoelectron spectroscopy (AR-HAXPES), combining Replica Exchange Monte Carlo with hierarchical integration to objectively and precisely estimate thin-film thickness.
-
What Shapes Electron Distributions in Nonequilibrium Nanowires?
Electronic transport in condensed matter
2026-4-20
A theoretical framework was developed to describe nonequilibrium electron distributions across the ballistic, diffusive, and local equilibrium transport regimes in voltage-biased nanowires in a unified manner.
-
Toward Clarification of Physical Properties of Quasicrystals: Noncollinear Magnetic Orders in Icosahedral Approximants
Cross-disciplinary physics and related areas of science and technology
Electronic transport in condensed matter
Magnetic properties in condensed matter
2026-4-6
An effective model based on magnetic anisotropy arising from a crystalline electric field is constructed for icosahedral approximants, which not only explains measured ferromagnets and antiferromagnets but also reveals new types of noncollinear magnetic orders.
-
Definitive Momentum and Spin Imaging Resolves 20-Year Debate on Gold Surface Spin
Electronic structure and electrical properties of surfaces and nanostructures
Magnetic properties in condensed matter
2026-4-1
Researchers at the Institute for Molecular Science (IMS) have utilized a cutting-edge Photoelectron Momentum Microscope (PMM) at the UVSOR Synchrotron Facility to settle a two-decade-long controversy concerning the direction of electron spin on the Au(111) surface. This study provides a definitive, full-map, comprehensive reference for quantum imaging that is essential for advancing spintronics technology.
-
Topological Hall Effect in Praseodymium Diantimonide
Magnetic properties in condensed matter
2026-2-27
The discovery of the topological Hall effect in a praseodymium-based compound is significant because its magnetism is not limited to a simple spin-only configuration as in many previous rare-earth systems.