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Resistivity Minimum in Highly Frustrated Itinerant Magnets
Zhentao Wang1,2, Kipton Barros3, Gia-Wei Chern4
1Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA.
Physical Review Letters
|November 26, 2016
Summary
Frustrated itinerant magnets exhibit a unique liquidlike spin state at low temperatures, driven by strong frustration. This state enhances electron scattering, causing resistivity to increase as temperature decreases.
Area of Science:
- Condensed matter physics
- Materials science
- Quantum magnetism
Background:
- Frustrated itinerant magnets possess localized classical moments interacting with conduction electrons.
- Strong frustration is key to stabilizing unusual magnetic states.
- The Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction is a fundamental mechanism in magnetic alloys.
Purpose of the Study:
- To investigate the transport properties of frustrated itinerant magnets.
- To understand the nature of the spin state stabilized by strong frustration.
- To explore the relationship between magnetic properties and electrical resistivity.
Main Methods:
- Theoretical study of transport properties.
- Analysis of spin dynamics and electron scattering.
- Examination of the spin structure factor and its temperature dependence.
Main Results:
- Strong frustration stabilizes a liquidlike spin state persisting below the RKKY interaction scale.
- A characteristic enhancement of the spin structure factor is observed at specific wave vectors.
- Increased electron scattering due to this spin state leads to a resistivity upturn at lower temperatures.
Conclusions:
- The liquidlike spin state in frustrated itinerant magnets significantly impacts electron transport.
- Resistivity upturn is a direct consequence of enhanced electron-spin scattering in this novel magnetic phase.
- Understanding these properties is crucial for designing materials with tailored electronic behavior.
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