Abstract
In a frustrated geometry, all types of orbitals are frustrated like spin. d orbital frustration could produce more emergent phenomena because transition elements have strong exchange interactions, spin-orbit coupling and magnetism. However, a real material possessing d orbital frustration is hard to find. Here, we calculate d orbital frustration in a Kagome lattice, which is identified in a new monolayer ferromagnetic Cu3O2. Nine types of d orbitals are considered, and each type generates a group of frustrated states. Three types of d orbitals and corresponding frustration states are found in the monolayer Cu3O2 we proposed. The monolayer structure is similar to a synthesized copper oxide sheet on an Au (111) surface. It is a ferromagnetic nanosheet, whose ferromagnetism is related to d-orbital-frustration-induced flat band. In addition, a possible route to experimentally synthesize Cu3O2 on SiC surface is discussed.
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