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Phys. Rev. Lett. 99, 197202 (2007) [4 pages]Quantum Theory of Orbital Magnetization and Its Generalization to Interacting Systems
Received 28 April 2007; published 9 November 2007
Based on standard perturbation theory, we present a full quantum derivation of the formula for the orbital magnetization in periodic systems. The derivation is generally valid for insulators with or without a Chern number, for metals at zero or finite temperatures, and at weak as well as strong magnetic fields. The formula is shown to be valid in the presence of electron-electron interaction, provided the one-electron energies and wave functions are calculated self-consistently within the framework of the exact current and spin-density functional theory. ©2007 The American Physical Society REFERENCES (19)
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