Microscopic origin of the linear temperature increase of the magnetic susceptibility of BaFe${}_2$As${}_2$

Abstract

Employing a combination of \emph{ab initio} band structure theory and dynamical mean-field theory we explain the experimentally observed linear temperature increase of the magnetic susceptibility of the iron pnictide material BaFe${}_2$As${}_2$. The microscopic origin of this anomalous behaviour is traced to a sharp peak in the spectral function located approximately 100 meV below the Fermi level. This peak is due to the weak dispersion of two-dimensional bands associated with the layered crystal structure of pnictides.

8 pages, 10 figures

References in corpus (11)

• Magnetic Order versus superconductivity in the Iron-based layered La(O1-xFx)FeAs systems
• Spin density wave anomaly at 140 K in the ternary iron arsenide BaFe2As2
• Dynamical Mean-Field Theory within an Augmented Plane-Wave Framework: Assessing Electronic Correlations in the Iron Pnictide LaFeAsO
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• Electronic Structure of Fe-Based Superconductors
• Universal linear-temperature dependence of static magnetic susceptibility in iron-pnictides
• Classification of the electronic correlation strength in the Fe-pnictides: The case of the parent compound BaFe2As2
• ARPES studies of the electronic structure of LaOFe(P,As)
• Non-analytic spin susceptibility of a nested Fermi liquid: the case of Fe-based pnictides
• Linear-Temperature Dependence of Static Magnetic Susceptibility in LaFeAsO from Dynamical Mean-Field Theory

Cited by in corpus (3)

• Crossover in the magnetic response of single-crystalline Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$ and Lifshitz critical point evidenced by Hall effect measurements
• Crystal growth and the electronic phase diagram of the 4$d$ doped Na${}_{1-\delta }$Fe${}_{1-x}$Rh${}_x$As in comparison with 3$d$ doped Na${}_{1-\delta }$Fe${}_{1-x}$Co${}_x$As
• Orbital-selective coherence-incoherence crossover and metal-insulator transition in Cu-doped NaFeAs