Spontaneous Anomalous Hall Effect Arising from an Unconventional Compensated Magnetic Phase in a Semiconductor

被引：177

作者：

Betancourt, R. D. Gonzalez ^{[1
,2
,3
]}

Zubac, J. ^{[2
,4
]}

Gonzalez-Hernandez, R. ^{[5
]}

Geishendorf, K. ^{[2
]}

Soban, Z. ^{[2
]}

Springholz, G. ^{[6
]}

Olejnik, K. ^{[2
]}

Smejkal, L. ^{[2
,7
]}

Sinova, J. ^{[2
,7
]}

Jungwirth, T. ^{[2
,8
]}

Goennenwein, S. T. B. ^{[1
,9
]}

Thomas, A. ^{[1
,3
]}

Reichlova, H. ^{[1
]}

Zelezny, J. ^{[2
]}

Kriegner, D. ^{[1
,2
]}

机构：

[1] Tech Univ Dresden, Inst Solid State & Mat Phys, D-01062 Dresden, Germany

[2] Acad Sci Czech Republ, Inst Phys, Cukrovarnicka 10, Prague 6, Czech Republic

[3] Leibniz Inst Solid State & Mat Res IFW Dresden, Helmholtz str 20, D-01069 Dresden, Germany

[4] Charles Univ Prague, Fac Math & Phys, Ke Karlovu 3, Prague 2, Czech Republic

[5] Univ Norte, Dept Fis & Geociencias, Barranquilla 080020, Colombia

[6] Johannes Kepler Univ Linz, Inst Semicond & Solid State Phys, Altenberger str 69, A-4040 Linz, Austria

[7] Johannes Gutenberg Univ Mainz, Inst Phys, D-55128 Mainz, Germany

[8] Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England

[9] Univ Konstanz, Dept Phys, D-78457 Constance, Germany

来源：

PHYSICAL REVIEW LETTERS | 2023年 / 130卷 / 03期

关键词：

ELECTRONIC-STRUCTURE; TOTAL-ENERGY;

D O I：

10.1103/PhysRevLett.130.036702

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The anomalous Hall effect, commonly observed in metallic magnets, has been established to originate from the time-reversal symmetry breaking by an internal macroscopic magnetization in ferromagnets or by a noncollinear magnetic order. Here we observe a spontaneous anomalous Hall signal in the absence of an external magnetic field in an epitaxial film of MnTe, which is a semiconductor with a collinear antiparallel magnetic ordering of Mn moments and a vanishing net magnetization. The anomalous Hall effect arises from an unconventional phase with strong time-reversal symmetry breaking and alternating spin polarization in real-space crystal structure and momentum-space electronic structure. The anisotropic crystal environment of magnetic Mn atoms due to the nonmagnetic Te atoms is essential for establishing the unconventional phase and generating the anomalous Hall effect.

引用

页数：7

共 49 条

[11] Spin-orbit torques in Co/Pt(111) and Mn/W(001) magnetic bilayers from first principles [J].