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Spin-momentum locking in pseudo-gap phase of Bi2Sr2CaCu2O8+δ bilayer
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Spin-momentum locking in pseudo-gap phase of Bi2Sr2CaCu2O8+δ bilayer
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Journal Article
Spin-momentum locking in pseudo-gap phase of Bi2Sr2CaCu2O8+δ bilayer
2023
Overview
We model Bi
2
Sr
2
CaCu
2
O
8+δ
(Bi2212) bilayer system by an inversion symmetry broken and time reversal non-invariant Bloch Hamiltonian involving interlayer tunnelling and spin–orbit coupling. The pseudo-gap (PG) phase of the bilayer is assumed to be chiral d-density wave ordered. We have found that the spin–orbit coupling (SOC) is inimical to this order. The presence of SOC was reported earlier in the PG phase in a spin- and angle-resolved photoemission spectroscopic measurement. We also report the theoretical study of the spin-momentum locking, due to the presence of a strong SOC. The non-trivial spin texture in
k
-space is found tuneable by electric field (and also by intercalation).
Publisher
Springer India,Springer Nature B.V
