Journal
ACTA PHYSICA SINICA
Volume 70, Issue 1, Pages -Publisher
CHINESE PHYSICAL SOC
DOI: 10.7498/aps.70.20202180
Keywords
unconventional superconductivity; spin excitation; superconducting pairing symmetry; spin resonance
Categories
Funding
- National Basic Research Program of China [2016YFA0300401]
- National Natural Science Foundation of China [11774152]
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The paper discusses the common features and non-s-wave superconducting pairing mechanism in high-Tc cuprates and iron-based superconductors, highlighting the possible mediation of Cooper pairs by spin fluctuations. It emphasizes that the interplay between magnetism and superconductivity remains an active research area.
High- T-c cuprates, iron-based superconductors, heavy-fermion superconductors and kappa-type layered organic superconductors share some common features - the proximity of the superconducting state to the magnetic ordered state and the non-s-wave superconducting pairing function. It is generally believed that the Cooper pairings in these unconventional superconductors are mediated by spin fluctuations. In this paper, we present a brief overview on the spin dynamics and unconventional pairing, focusing on high- T-c, cuprates and iron-based superconductors. In particular, we will overview the properties of the neutron spin resonance and its possible origin, the pairing mechanism in Hubbard model within the weak-coupling framework and its application to the aforesaid unconventional superconductors. We point out that the interplay between magnetism and superconductivity is still an area of active research.
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