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Published on: August 2, 2019
Theory of multiband superconductivity in spin-density-wave metals
J-P Ismer1, Ilya Eremin, Enrico Rossi
1Institut für Theoretische Physik III, Ruhr-Universität Bochum, D-44801 Bochum, Germany.
Physical Review Letters
|September 28, 2010
Summary
We explore how spin density waves (SDW) influence multiband superconductivity (SC). Our findings reveal that SDW order suppresses s-wave SC more than d-wave SC in 2D systems.
Area of Science:
- Condensed Matter Physics
- Materials Science
Background:
- Spin density waves (SDW) can coexist with superconductivity (SC).
- Understanding the interplay between SDW and SC is crucial for novel electronic materials.
Purpose of the Study:
- Investigate the emergence of multiband superconductivity with s- and d-wave symmetries.
- Analyze the impact of SDW coherence factors on the SC gap symmetry.
- Determine how SDW order affects different superconducting states.
Main Methods:
- Theoretical study of superconductivity on an SDW background.
- Analysis of superconducting gap renormalization due to SDW coherence factors.
- Examination of interband Cooper pair scattering effects.
Main Results:
- SDW coherence factors renormalize the SC gap, leading to unconventional s-wave symmetry.
- Interband Cooper pair scattering stabilizes both s- and d-wave superconductivity.
- Increasing SDW order suppresses the s-wave SC state more than the d-wave state.
Conclusions:
- The interplay between SDW and SC leads to unconventional superconducting states.
- The relative stability of s-wave and d-wave SC depends on the strength of the SDW order.
- Results are applicable to 2D systems with commensurate SDW, offering insights for material design.
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