Spin-orbit coupling induced magnetism in the $d$-density wave phase of La${}_{2-x}$Ba${}_x$CuO${}_4$ superconductors

Abstract

We study the effects of spin-orbit coupling in the $d$-density wave (DDW) phase. In the low-temperature orthorhombic phase of La${}_{2-x}$Ba${}_x$CuO${}_4$, we find that spin-orbit coupling induces a ferromagnetic moment in the DDW phase, which is polarized along the [110] direction with a considerable magnitude. This effect does not exist in the superconducting phase. On the other hand, if the $d$-density wave order does not exist at zero field, a magnetic field along the [110] direction always induces such a staggered orbital current. We discuss experimental constraints on the DDW states in light of our theoretical predictions.

arXiv comment4 pages, 5 figures, accepted by Phys. Rev. Lett

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• Manifestations of spin-orbit coupling in a cuprate superconductor
• Doping Dependence of Spin-Momentum Locking in Bismuth-Based High-Temperature Cuprate Superconductors
• Pseudogap enhancement due to magnetic impurities in d-density waves
• The pseudogap phase in (TaSe_4)_2I