Journal
PHYSICAL REVIEW B
Volume 80, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.80.064507
Keywords
antiferromagnetic materials; barium compounds; Fermi surface; ground states; high-temperature superconductors; iron compounds; magnetic superconductors
Funding
- Department of Energy
- Office of Basic Energy Sciences [DE-AC02-76SF00515]
- EPSRC [EP/F038836/1]
- NSF
- state of Florida
- EPSRC [EP/F038836/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/F038836/1] Funding Source: researchfish
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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 BaFe2As2. 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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