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  Evidence of Mott physics in iron pnictides from x-ray spectroscopy

Lafuerza, S., Gretarsson, H., Hardy, F., Wolf, T., Meingast, C., Giovannetti, G., et al. (2017). Evidence of Mott physics in iron pnictides from x-ray spectroscopy. Physical Review B, 96(4): 045133.

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Item Permalink: https://hdl.handle.net/21.11116/0000-000E-D472-2 Version Permalink: https://hdl.handle.net/21.11116/0000-000E-D473-1
Genre: Journal Article

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 Creators:
Lafuerza, S., Author
Gretarsson, H.1, Author
Hardy, F., Author
Wolf, T., Author
Meingast, C., Author
Giovannetti, G., Author
Capone, M., Author
Sefat, A., Author
Kim, Y., Author
Glatzel, P., Author
de' Medici, L., Author
Affiliations:
1Max Planck Society, ou_persistent13              

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 Abstract: The existence of large instantaneous local magnetic moments in paramagnetic phases is a direct signature of Mott localization. In order to track the doping evolution of fluctuating local moments in iron-based superconductors, we jointly use two fast probes, x-ray emission and absorption spectroscopies. Exploring K-and Cr-hole-doped BaFe2As2, we find a systematic increase in the local moment with hole-doping, in contrast with inelastic neutron scattering measurements, which suggest an opposite trend. Our results support the theoretical scenario in which a Mott insulating state that would be realized for half-filled conduction bands has an influence throughout the phase diagram of these iron pnictides.

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Language(s): eng - English
 Dates: 2017
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 735005
ISI: 000406292600005
 Degree: -

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Title: Physical Review B
Source Genre: Journal
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Publ. Info: COLLEGE PK : AMER PHYSICAL SOC
Pages: - Volume / Issue: 96 (4) Sequence Number: 045133 Start / End Page: - Identifier: ISSN: 2469-9950