Journal
PHYSICAL REVIEW B
Volume 92, Issue 17, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.92.174502
Keywords
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Funding
- Topological Quantum Phenomena [25103711]
- MEXT of Japan
- JSPS [24740230, 15K05164, 15H05745, 15H05884]
- Grants-in-Aid for Scientific Research [15K05164, 14J03970, 15H05884, 15H05745, 24740230] Funding Source: KAKEN
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We show that odd-parity superconductivity occurs in multilayer Rashba systems without requiring spin-triplet Cooper pairs. A pairing interaction in the spin-singlet channel stabilizes the odd-parity pair-density-wave (PDW) state in the magnetic field parallel to the two-dimensional conducting plane. It is shown that the layer-dependent Rashba spin-orbit coupling and the orbital effect play essential roles for the PDW state in binary and tricolor heterostructures. We demonstrate that the odd-parity PDW state is a symmetry-protected topological superconducting state characterized by the one-dimensional winding number in the symmetry class BDI. The superconductivity in the artificial heavy-fermion superlattice CeCoIn5/YbCoIn5 and bilayer interface SrTiO3/LaAlO3 is discussed.
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