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Kondo Effect in Nonreciprocal Response
Hajime Murata1, Hiroaki Ishizuka1
1Institute of Science Tokyo, Department of Physics, Meguro, Tokyo, 152-8551, Japan.
Physical Review Letters
|July 31, 2026
Summary
Quantum fluctuations and chiral spin correlations create a unique log(T) temperature dependence in the electrical magnetochiral effect. This discovery reveals new insights into transport phenomena in chiral magnetic states.
Area of Science:
- Condensed matter physics
- Quantum magnetism
- Spintronics
Background:
- Chiral magnetic states exhibit phenomena like the anomalous Hall effect and magnetochiral dichroism.
- Previous electrical transport studies primarily considered classical local magnetic moments.
Purpose of the Study:
- To investigate the impact of quantum fluctuations and chiral spin correlations on electrical transport.
- To explore the temperature dependence of the electrical magnetochiral effect.
Main Methods:
- Utilized the Green's function method.
- Employed a scattering theory approach.
Main Results:
- Revealed a log(T) temperature dependence in the electrical magnetochiral effect due to quantum fluctuations and chiral spin correlations.
- Identified a scattering process analogous to the Kondo effect responsible for this temperature dependence.
- Demonstrated the sensitivity of the electrical magnetochiral effect to vector spin chirality sign and magnetic field.
Conclusions:
- Quantum fluctuations and local spin correlations together induce novel transport properties.
- The findings offer a deeper understanding of electrical transport in chiral magnetic systems.
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