Prediction of antiferromagnetism in barium chromium phosphide confirmed after synthesis

We have carried out density-functional theory (DFT) calculations for the chromium pnictide BaCr2P2, which is structurally analogous to BaFe2As2, a parent compound for iron-pnictide superconductors. Evolutionary methods combined with DFT predict that the chromium analog has the same crystal structure...

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Bibliographic Details
Published inJournal of physics. Condensed matter Vol. 32; no. 2; p. 25502
Main Authors Jishi, R A, Rodriguez, J P, Haugan, T J, Susner, M A
Format Journal Article
LanguageEnglish
Published IOP Publishing 09.01.2020
Subjects
chromium arsenides
chromium pnictides
density-functional theory
iron superconductors
itinerant antiferromagnetism
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Summary:We have carried out density-functional theory (DFT) calculations for the chromium pnictide BaCr2P2, which is structurally analogous to BaFe2As2, a parent compound for iron-pnictide superconductors. Evolutionary methods combined with DFT predict that the chromium analog has the same crystal structure as the latter. DFT also predicts Néel antiferromagnetic order on the chromium sites. Comparison with a simple electron-hopping model over a square lattice of chromium atoms suggests that it is due to residual nesting of the Fermi surfaces. We have confirmed the DFT predictions directly after the successful synthesis of polycrystalline samples of BaCr2P2. X-ray diffraction recovers the predicted crystal structure to high accuracy, while magnetic susceptibility and specific-heat measurements are consistent with a transition to an antiferromagnetically ordered state below K.
Bibliography:JPCM-114423.R1
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ISSN:0953-8984
1361-648X
DOI:10.1088/1361-648X/ab45dc