Ferroelectric phase transitions in multiferroic Ge1-xMnxTe driven by local lattice distortions

被引：13

作者：

Kriegner, Dominik ^{[1
]}

Furthmueller, Juergen ^{[2
]}

Kirchschlager, Raimund ^{[3
]}

Endres, Jan ^{[1
]}

Horak, Lukas ^{[1
]}

Cejpek, Petr ^{[1
]}

Reichlova, Helena ^{[4
]}

Marti, Xavier ^{[4
]}

Primetzhofer, Daniel ^{[5
]}

Ney, Andreas ^{[3
]}

Bauer, Guenther ^{[3
]}

Bechstedt, Friedhelm ^{[2
]}

Holy, Vaclav ^{[1
]}

Springholz, Gunther ^{[3
]}

机构：

[1] Charles Univ Prague, Dept Condensed Matter Phys, Ke Karlovu 5, Prague 12116 2, Czech Republic

[2] Friedrich Schiller Univ, Inst Festkorpertheorie & Opt, Max Wien Pl 1, D-07743 Jena, Germany

[3] Johannes Kepler Univ Linz, Inst Semicond & Solid State Phys, Altenbergerstr 69, A-4040 Linz, Austria

[4] ASCR, Vvi, Inst Phys, Cukrovarnicka 10, Prague 16253 6, Czech Republic

[5] Uppsala Univ, Ion Phys Dept, Angstrom Lab, POB 534, SE-75121 Uppsala, Sweden

来源：

PHYSICAL REVIEW B | 2016年 / 94卷 / 05期

基金：

奥地利科学基金会;

关键词：

SEMICONDUCTOR GE1-XMNXTE; GETE; GEMNTE; ALLOYS; HEAT; MN;

D O I：

10.1103/PhysRevB.94.054112

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The evolution of local ferroelectric lattice distortions in multiferroic Ge1-xMnxTe is studied by x-ray diffraction, x-ray absorption spectroscopy, and density functional theory. We show that the anion/cation displacements smoothly decrease with increasing Mn content, thereby reducing the ferroelectric transition from 700 to 100 K at x = 0.5, where the ferromagnetic Curie temperature reaches its maximum. First principles calculations explain this quenching by different local bond contributions of the Mn 3d shell compared to the Ge 4s shell in excellent quantitative agreement with the experiments.

引用

页数：8

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