Electronic structure and exotic exchange splitting in spin-density-wave states of BaFe${}_2$As${}_2$

Abstract

The magnetic properties in the parent compounds are often intimately related to the microscopic mechanism of superconductivity. Here we report the first direct measurements on the electronic structure of a parent compound of the newly discovered iron-based superconductor, BaFe${}_2$As${}_2$, which provides a foundation for further studies. We show that the energy of the spin density wave (SDW) in BaFe${}_2$As${}_2$ is lowered through exotic exchange splitting of the band structure, rather than Fermi surface nesting of itinerant electrons. This clearly demonstrates that a metallic SDW state could be solely induced by interactions of local magnetic moments, resembling the nature of antiferromagnetic order in cuprate parent compounds.

5 pages, 4 figures

References in corpus (12)

• Flux Compactification
• GUTs and Exceptional Branes in F-theory - II: Experimental Predictions
• Warped Supersymmetry Breaking
• Modulus-dominated SUSY-breaking soft terms in F-theory and their test at LHC
• Constraints for the existence of flat and stable non-supersymmetric vacua in supergravity
• Deflected Mirage Mediation: A Framework for Generalized Supersymmetry Breaking
• SUSY breaking mediation by throat fields
• Flavor and CP conserving moduli mediated SUSY breaking in flux compactification
• On Anomaly Mediated SUSY Breaking
• Comments on Quantum Effects in Supergravity Theories
• String Phenomenology and the Cosmological Constant
• The Scales of Brane Nucleation Processes

Cited by in corpus (1)

• SUSY Breaking in Local String/F-Theory Models