Pressure-induced transition to the collapsed tetragonal phase in BaC r2 A s2

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

doi:10.1103/PhysRevB.95.144106

Pressure-induced transition to the collapsed tetragonal phase in BaC r2 A s2

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

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14 Scopus citations

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.

Original language	English (US)
Article number	144106
Journal	Physical Review B
Volume	95
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevB.95.144106
State	Published - Apr 7 2017
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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title = "Pressure-induced transition to the collapsed tetragonal phase in BaC r2 A s2",

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.",

author = "Naumov, {P. G.} and K. Filsinger and Barkalov, {O. I.} and Fecher, {G. H.} and Medvedev, {S. A.} and C. Felser",

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AU - Naumov, P. G.

AU - Filsinger, K.

AU - Barkalov, O. I.

AU - Fecher, G. H.

AU - Medvedev, S. A.

AU - Felser, C.

PY - 2017/4/7

Y1 - 2017/4/7

N2 - 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.

AB - 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.

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Pressure-induced transition to the collapsed tetragonal phase in BaC r2 A s2

Abstract

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