Quantum criticality in the iron pnictides and chalcogenides

Details Quantum criticality in the iron pnictides and chalcogenides Quantum criticality in the iron pnictides and chalcogenides

2011-01-25

arxiv.org/abs/1101.4701v1

J. Phys.: Condens. Matter 23, 223201 (2011)

Physics

Condensed Matter

Superconductivity

20 pages, 9 figures

Scientific paper

10.1088/0953-8984/23/22/223201

Superconductivity in the iron pnictides and chalcogenides arises at the border of antiferromagnetism, which raises the question of the role of quantum criticality. In this topical review, we describe the theoretical work that led to the prediction for a magnetic quantum critical point arising out of a competition between electronic localization and itinerancy, and the proposal for accessing it by using isoelectronic P substitution for As in the undoped iron pnictides. We go on to compile the emerging experimental evidence in support of the existence of such a quantum critical point in isoelectronically-tuned iron pnictides. We close by discussing the implications of these results for the physics of the iron pnictides and chalcogenides.

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