Hall Effect in Nested Antiferromagnets Near the Quantum Critical Point

Abstract

We investigate the behavior of the Hall coefficient in the case of antiferromagnetism driven by Fermi surface nesting, and find that the Hall coefficient should abruptly increase with the onset of magnetism, as recently observed in vanadium doped chromium. This effect is due to the sudden removal of flat portions of the Fermi surface upon magnetic ordering. Within this picture, the Hall coefficient should scale as the square of the residual resistivity divided by the impurity concentration, which is consistent with available data.

arXiv commentpublished version; an accidental interchange in the quoting of $sigm{a}_{xyz}$ analytic dependencies was corrected

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• High Resolution Study of Magnetic Ordering at Absolute Zero
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• The Hall conductivity in unconventional charge density wave systems
• Fermi Surface of Cr${}_{1-x}$V${}_x$ across the Quantum Critical Point
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