Pressure-induced transition to the collapsed tetragonal phase in BaCr2As2

Naumov, P. G.; Filsinger, K.; Barkalov, O. I.; Fecher, G. H.; Medvediev, S. A.; Felser, C.

doi:10.1103/PhysRevB.95.144106

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Pressure-induced transition to the collapsed tetragonal phase in BaCr₂As₂

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Naumov, P. G.
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Filsinger, K.
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Barkalov, O. I.
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Fecher, G. H.
Gerhard Fecher, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Medvediev, S. A.
Sergiy Medvediev, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Felser, C.
Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Naumov, P. G., Filsinger, K., Barkalov, O. I., Fecher, G. H., Medvediev, S. A., & Felser, C. (2017). Pressure-induced transition to the collapsed tetragonal phase in BaCr₂As₂. Physical Review B, 95(14): 144106, pp. 1-6. doi:10.1103/PhysRevB.95.144106.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002D-3F0C-3

Abstract

The structural and electronic properties of BaCr2As2, which is isostructural to the 122 iron arsenide superconductors, are studied at high pressures using synchrotron x-ray powder diffraction, electrical resistivity measurements, and first-principles calculations. At a pressure of about 18.5 GPa, an isostructural phase transition to a collapsed tetragonal phase is observed, similar to that in BaFe2As2. In both phases, BaCr2As2 is a normal metal. Electronic structure calculations suggest a metallic and antiferromagnetic ground state with G-type magnetic order for the collapsed tetragonal phase.