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- W3000512374 abstract "We theoretically study a time-reversal-invariant three-dimensional superfluid model by stacking in $z$ direction identical bilayer models with intralayer spin-orbit coupling and contrary Zeeman energy splitting for different layer, which has been suggested recently to realize two-dimensional time-reversal-invariant topological superfluid. We find that this model shows two kinds of topologically nontrivial phases: gapless phases with nodal lines in pairs protected by chiral symmetry and a gapped phase, both of which support time-reversal-invariant Majorana Fermi arc (MFA) on the $yz$ and $xz$ side surface. These MFA abide by time-reversal and particle-hole symmetries and are topologically protected by the winding numbers in mirror subspaces and $Z_2$ numbers of two-dimensional DIII class topological superfluid, different from MFA in the time-reversal broken Weyl superfluid protected by nonzero Chern number. This important observation means that MFA in our model represents a new type of topological state not explored previously. The Zeeman field configuration in our model is relevant to antiferromagnetic topological insulator MnBi$_2$Te$_4$, thus our work stimulates the further studies on superconducting effects in the realistic antiferromagnetic topological insulator." @default.
- W3000512374 created "2020-01-23" @default.
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- W3000512374 date "2020-02-13" @default.
- W3000512374 modified "2023-10-08" @default.
- W3000512374 title "Nodal line topological superfluid and multiply protected Majorana Fermi arc in a three-dimensional time-reversal-invariant superfluid model" @default.
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- W3000512374 doi "https://doi.org/10.1088/1361-648x/ab6bea" @default.
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