Nematic order in a degenerate Hubbard model with spin-orbit coupling

J Phys Condens Matter. 2013 Aug 28;25(34):345602. doi: 10.1088/0953-8984/25/34/345602. Epub 2013 Jul 29.

Abstract

Using Bogoliubov's inequality we rigorously show that the multiorbital Hubbard model with narrow bands, even in the presence of spin-orbit coupling, does not exhibit long-range nematic order, in low dimensions. This result holds at any finite temperature for both repulsive and attractive Coulomb interactions, with and without spin-orbit coupling.