Document Type : Original Article
Author
Department of Physics, Faculty of Science, Qom University of Technology, Qom, Iran
Abstract
Recently, the extended Kitaev-Heisenberg model has been proposed to describe spin-orbital Mott insulators, such as iridate oxides and ruthenium chloride with honeycomb lattice. Using mean-field theory, we obtain the linear gap equations to find all possible superconducting phases in terms of different exchanges and doping levels. Our calculation based on the hole-doped model, in the presence of the off-diagonal exchange , shows the spin-triplet states can be stable in a larger area related to the doped Kitaev-Heisenberg model with K0. However, the finite ferromagnetic off-diagonal exchange solely cannot generate the triplet pairing instabilities in competition with the antiferromagnetic-Heisenberg and -Kitaev exchanges.
Keywords
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