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Superconductivity and spin-orbit coupling in non-centrosymmetric materials: a review
M Smidman1, M B Salamon2, H Q Yuan1,3
1Center for Correlated Matter and Department of Physics, Zhejiang University, Hangzhou 310058, People's Republic of China.
Reports on Progress in Physics. Physical Society (Great Britain)
|January 11, 2017
Summary
Non-centrosymmetric superconductors, lacking inversion symmetry, allow antisymmetric spin-orbit coupling (ASOC). This coupling can mix spin-singlet and spin-triplet pairing states, leading to exotic superconducting phenomena.
Area of Science:
- Condensed Matter Physics
- Superconductivity Research
- Materials Science
Background:
- Non-centrosymmetric superconductors lack a center of inversion, breaking parity symmetry.
- This symmetry breaking allows for antisymmetric spin-orbit coupling (ASOC).
- ASOC can significantly alter superconducting properties, including pairing states.
Purpose of the Study:
- To review experimental and theoretical findings on non-centrosymmetric superconductors.
- To evaluate the impact of ASOC on superconducting properties.
- To explore evidence for spin-singlet and spin-triplet pairing mixture.
Main Methods:
- Conceptual overview of theoretical results.
- Review of experimental properties of bulk and 2D materials.
- Detailed theoretical analysis of ASOC effects.
Main Results:
- ASOC can lead to mixed spin-singlet and spin-triplet superconducting states.
- Experimental evidence for ASOC effects in various non-centrosymmetric systems is examined.
- Theoretical implications include altered pairing symmetry, magnetic response, and topological superconductivity.
Conclusions:
- Non-centrosymmetric superconductors offer a rich platform for novel physics due to ASOC.
- Understanding ASOC is crucial for exploring exotic superconducting states and phenomena.
- Further research can unlock potential applications in topological superconductivity.
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