Rashba-metal to Mott-insulator transition

Abstract

The recent discovery of materials featuring strong Rashba spin-orbit coupling (RSOC) and strong electronic correlation raises questions about the interplay of Mott and Rashba physics. In this work, we employ cluster perturbation theory to investigate the spectral properties of the two-dimensional Hubbard model in the presence of a significant or large RSOC. We show that RSOC strongly favors metallic phases and competes with Mott localization, leading to an unconventional scenario for the Mott transition which is no longer controlled by the ratio between the Hubbard $U$ and an effective bandwidth. The results show a strong sensitivity to the value of the RSOC.

arXiv comment11 pages, 9 figures

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Cited by in corpus (5)

• Phase diagram of the square lattice Hubbard model with Rashba-type antisymmetric spin-orbit coupling
• Weyl Semimetallic State in the Rashba-Hubbard Model
• Magnetism and metal-insulator transitions in the Rashba-Hubbard model
• Weyl semimetallic, Néel, spiral, and vortex states in the Rashba-Hubbard model
• Spin singlet topological superconductivity in the attractive Rashba Hubbard model