Anomalous magnetic response of the spin-one-half Falicov-Kimball model
J. K. Freericks (Georgetown University), V. Zlatic' (Institute of, Physics, Zagreb, Croatia)
TL;DR
This paper provides an exact solution for the spin-one-half Falicov-Kimball model in a magnetic field, revealing an unusual magnetic response due to thermally excited local moments that vanish at low temperatures.
Contribution
It offers an exact solution in infinite dimensions and explores the anomalous magnetic behavior, linking theoretical results to potential real materials.
Findings
Magnetic susceptibility calculated at zero field
Magnetization dependence on magnetic field strength
Anomalous magnetic response due to thermal excitations
Abstract
The infinite-dimensional spin one-half Falicov-Kimball model in an external magnetic field is solved exactly. We calculate the magnetic susceptibility in zero field, and the magnetization as a function of the field strength. The model shows an anomalous magnetic response from thermally excited local moments that disappear as the temperature is lowered. We describe possible real materials that may exhibit this kind of anomalous behavior.
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