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Minimal Models and Transport Properties of Unconventional p-Wave Magnets
Bjørnulf Brekke1, Pavlo Sukhachov1, Hans Gløckner Giil1
1Center for Quantum Spintronics, Department of Physics, <a href="https://ror.org/05xg72x27">Norwegian University of Science and Technology</a>, NO-7491 Trondheim, Norway.
Physical Review Letters
|December 23, 2024
Summary
New unconventional magnets with p-wave spin polarization offer unique functionalities for spintronics. An effective analytical model aids their discovery and application, revealing large magnetoresistance and spin filtering without net magnetization.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Spintronics
Background:
- Recent proposals of unconventional compensated magnets with p-wave spin polarization, inspired by altermagnets.
- Need for theoretical models to guide experimental discovery and applications of these novel magnetic materials.
Purpose of the Study:
- To construct an effective analytical model for unconventional p-wave magnets.
- To clarify the relationship between p-wave magnets and other magnetic systems with p-wave spin-polarized bands.
- To explore the potential functionalities of these magnets for spintronics applications.
Main Methods:
- Development of a minimal tight-binding model for unconventional p-wave magnets.
- Application of analytical approaches to study the model's essential features.
- Evaluation of tunneling conductance in junctions incorporating p-wave magnets.
Main Results:
- Demonstration of large magnetoresistance in p-wave magnet junctions.
- Observation of spin filtering effects.
- Identification of anisotropic bulk spin conductivity beyond linear response, despite zero net magnetization.
Conclusions:
- The developed analytical model effectively captures key features of p-wave magnets.
- Unconventional p-wave magnets exhibit significant functionalities like magnetoresistance and spin filtering.
- These materials expand the range of usable materials for advanced spintronics devices.
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