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Superconductivity in strongly correlated materials, including high-Tc cuprates, iron pnictides/chalcogenides, and heavy fermion compounds, has been of interest to researchers for decades. With the continuous improvement of thin-film growth techniques, these strongly correlated atomic layer thin films and heterostructures have been realized, revealing the superconducting properties changed at surface and by adjacent materials.
In this talk, I will present the exotic superconductivity of heavy fermion superlattices fabricated by a state-of-the-art molecular beam epitaxy technique. I will present the mutual interactions between d-wave superconductivity and magnetic order through the interface in the hybrid superlattices formed by alternating atomically thin layers of heavy-fermion d-wave superconductor CeCoIn5 and an antiferromagnetic heavy-fermion metal [1, 2]. I will also show that in the tricolor superlattice with global broken inversion symmetry, the superconducting properties of CeCoIn5 are significantly altered by Rashba spin-orbital interactions and a helical or stripe superconducting phase may appear at very low temperature [3].
[1] MN et al., Phys. Rev. Lett. 120, 187002 (2018)
[2] MN et al., Phys. Rev. B 100, 024507 (2019)
[3] MN et al., Phys. Rev. B 96, 174512 (2017)
Dr. Masahiro Naritsuka obtained his PhD in Physics degree with Prof. Yuji Matsuda from Kyoto University in 2020. Subsequently, he worked as a postdoctoral researcher with Prof. Yukio Hasegawa at the Institute for Solid State Physics, the University of Tokyo. Since September 2020, he has joined Peter Wahl group in University of St. Andrews as a postdoctoral fellow, engaging in thin film fabrications and scanning tunneling microscopy to understand emergent orders in strongly correlated electron systems.