ISIS Neutron and Muon Source Data Journal

Spin excitation as a probe of electron correlation strength in over doped BaFe2(As0.3P0.7)2

Abstract: Evidence is building that iron pnictides inhabit the mostly unexplored ¿intermediate¿ region of electronic correlation strength, which is neither very weak coupling, nor strong coupling, as occurs in the undoped copper oxides. Recently, a combined DFT and DMFT theory may provide a realistic approach to describe the partially itinerant and partially localized electrons. In this theory, pnictogen height controls the strength of electron correlations which is inversely proportional to the spin excitation bandwidth. As a unique system with isoelectronic doping (maximum TC=30K), P substitution almost does not induce substantial impurity with a continuous reduction of pnictogen height with doping. Therefore we propose 8 days beamtime on MERLIN/MAPS to study the spin excitations in over-doped BaFe2(As03P0.7)2 to compare the results of charge doped Ba122 compounds and test this theory directly.

Principal Investigator: Professor Pengcheng Dai
Experimenter: Mr Ding Hu

DOI: 10.5286/ISIS.E.RB1510249

ISIS Experiment Number: RB1510249

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Professor Pengcheng Dai et al; (2015): Spin excitation as a probe of electron correlation strength in over doped BaFe2(As0.3P0.7)2, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1510249

Data is released under the CC-BY-4.0 license.