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Report No.

Enhancement of an effective spin-orbit coupling in a correlated metal

Kubo, Katsunori 

In recent years, phenomena originating from spin-orbit coupling (SOC), such as topological phenomena, have been intensively studied. To realize these phenomena, materials containing heavy elements have been investigated because of large SOC. On the other hand, to enhance the effect of the SOC, it may be possible to use enhancement of the effective SOC by the Coulomb interaction between electrons. In this study, to investigate such enhancement of the SOC, we consider a two-orbital model, which is a minimal model to include SOC. By using the variational Monte Carlo method, we find that the effective SOC can become several times larger than the bare value by the Coulomb interaction. This study will expand the target materials for the SOC-originated phenomena to strongly correlated metals without heavy elements.



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