6 Ja n 20 13 Orbital Magnetization as a Local Property

ar X iv : c on d - m at / 0 10 11 04 9 Ja n 20 01 Classical and quantum magnetization reversal studied in nanometer - sized particles and clusters

Ja n 19 99 Temperature dependence of local states due to S = 1 / 2 impurities and their correlation in a S = 1 Heisenberg chain

We study the temperature dependence of the low temperature spin configurations, investigating the magnetization profile of the local states due to the impurities and the two point correlation function centered in one of the impurities. This correlation is found to be weak against temperature effects although the magnetization profile in the triplet state is visible up to higher temperatures. He...

Dichroic f-sum rule and the orbital magnetization of crystals

We consider the magnetic circular dichroism spectrum of a crystal with broken time-reversal symmetry in the electric-dipole approximation. Using the Kubo-Greenwood formula for the absorptive part of the antisymmetric optical conductivity, its frequency integral is recast as a ground-state property. We show that in insulators this quantity is proportional to the circulation of the occupied Wanni...

Orbital magnetization in periodic insulators.

Working in the Wannier representation, we derive an expression for the orbital magnetization of a periodic insulator. The magnetization is shown to be comprised of two contributions, an obvious one associated with the internal circulation of bulklike Wannier functions in the interior, and an unexpected one arising from net currents carried by Wannier functions near the surface. Each contributio...

2 5 Ja n 20 05 One - Dimensional Magnetism

We present an up-to-date survey of theoretical concepts and results in the field of one-dimensional magnetism and of their relevance to experiments and real materials. Main emphasis of the chapter is on quantum phenomena in models of localized spins with isotropic exchange and additional interactions from anisotropy and external magnetic fields. Three sections deal with the main classes of mode...