Odd-parity superconductivity by competing spin-orbit coupling and orbital effect in artificial heterostructures
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Abstract
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 CeCoIn[5]/YbCoIn[5] and bilayer interface SrTiO[3]/LaAlO[3] is discussed.
Journal
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- Physical Review B
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Physical Review B 92 (17), 2015-11-02
American Physical Society
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Details 詳細情報について
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- CRID
- 1050564285780476160
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- NII Article ID
- 120005712927
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- NII Book ID
- AA11187113
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- ISSN
- 10980121
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- HANDLE
- 2433/207616
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- Text Lang
- en
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- Article Type
- journal article
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- Data Source
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- IRDB
- CiNii Articles