Pressure-induced transition to the collapsed tetragonal phase in BaCr2As2

被引：16
作者：
Naumov, P. G. [1 ,2 ]
Filsinger, K. [1 ]
Barkalov, O. I. [1 ,3 ]
Fecher, G. H. [1 ]
Medvedev, S. A. [1 ]
Felser, C. [1 ]
机构：
[1] Max Planck Inst Chem Phys Solids, Nothnitzer Str 40, D-01187 Dresden, Germany
[2] Russian Acad Sci, Fed Sci Res Ctr Crystallog & Photon, Shubnikov Inst Crystallog, Leninskii Prospekt 59, Moscow 119333, Russia
[3] Russian Acad Sci, Inst Solid State Phys, Acad Ossipyan Str 2, Chernogolovka 142432, Moscow District, Russia
来源：
PHYSICAL REVIEW B | 2017年 / 95卷 / 14期
关键词：
SUPERCONDUCTORS;
D O I：
10.1103/PhysRevB.95.144106
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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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页数：6
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