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Quantum oscillations in the parent pnictide BaFe₂As₂ : itinerant electrons in the reconstructed state

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arxiv 0902.1172 v1 pith:SXAHSTIO submitted 2009-02-06 cond-mat.supr-con cond-mat.str-el

Quantum oscillations in the parent pnictide BaFe₂As₂ : itinerant electrons in the reconstructed state

James G. Analytis , Ross D. McDonald , Jiun-Haw Chu , Scott C. Riggs , Alimamy F. Bangura , Chris Kucharczyk , Michelle Johannes , I. R. Fisher This is my paper
classification cond-mat.supr-con cond-mat.str-el
keywords statefermimeasurementssurfaceantiferromagneticelectronsgrounditinerant
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We report quantum oscillation measurements that enable the direct observation of the Fermi surface of the low temperature ground state of \ba122. From these measurements we characterize the low energy excitations, revealing that the Fermi surface is reconstructed in the antiferromagnetic state, but leaving itinerant electrons in its wake. The present measurements are consistent with a conventional band folding picture of the antiferromagnetic ground state, placing important limits on the topology and size of the Fermi surface.

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