Cheng Peng:"Spin Interactions in van der Waals MPX₃ Magnets: From Microscopic Origins to Spin Model" скачать в хорошем качестве

Cheng Peng:"Spin Interactions in van der Waals MPX₃ Magnets: From Microscopic Origins to Spin Model"

Delving into the microscopic origins of magnetic interactions in van der Waals magnets MPX₃, we find that direction-selective spin interactions become active when transition metals exhibit pronounced spin-orbit coupling (SOC). Nearest-neighbor metal d-electron hopping occurs via the metal (M)–ligand (X)–metal (M) pathway along shared edge octahedra, modifying the orbital overlap along the three nearest-neighbor bond directions on the honeycomb lattice and thereby introducing anisotropy. Moreover, even when the metals themselves exhibit weak SOC, strong SOC in heavy ligands, combined with significant Hund’s coupling, can induce bond-dependent Kitaev interactions. These insights pave the way for engineering spin models in van der Waals magnets. In this context, I will discuss the potential of crafting Kitaev spin interactions using transition-metal chalcogenophosphates.