期刊
REPORTS ON PROGRESS IN PHYSICS
卷 80, 期 3, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1361-6633/80/3/036501
关键词
non-centrosymmetric superconductors; singlet-triplet mixing; spin-orbit coupling; topological superconductors
资金
- NSF [DMREF-1335215]
- National Natural Science Foundation of China [11474251, U1632275]
- National Key RAMP
- D Program of the MOST of China [2016YFA0300202]
- Science Challenge Program of China
- Max Planck Society of the Max Planck Partner Group of the Max Planck Institute for Chemical Physics of Solids
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1335215] Funding Source: National Science Foundation
In non-centrosymmetric superconductors, where the crystal structure lacks a centre of inversion, parity is no longer a good quantum number and an electronic antisymmetric spin-orbit coupling (ASOC) is allowed to exist by symmetry. If this ASOC is sufficiently large, it has profound consequences on the superconducting state. For example, it generally leads to a superconducting pairing state which is a mixture of spin-singlet and spin-triplet components. The possibility of such novel pairing states, as well as the potential for observing a variety of unusual behaviors, led to intensive theoretical and experimental investigations. Here we review the experimental and theoretical results for superconducting systems lacking inversion symmetry. Firstly we give a conceptual overview of the key theoretical results. We then review the experimental properties of both strongly and weakly correlated bulk materials, as well as two dimensional systems. Here the focus is on evaluating the effects of ASOC on the superconducting properties and the extent to which there is evidence for singlet-triplet mixing. This is followed by a more detailed overview of theoretical aspects of non-centrosymmetric superconductivity. This includes the effects of the ASOC on the pairing symmetry and the superconducting magnetic response, magneto-electric effects, superconducting finite momentum pairing states, and the potential for non-centrosymmetric superconductors to display topological superconductivity.
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