Development of ferromagnetism in the doped topological insulator Bi2-xMnxTe3

被引：414

作者：

Hor, Y. S. ^{[1
]}

Roushan, P. ^{[2
]}

Beidenkopf, H. ^{[2
]}

Seo, J. ^{[2
]}

Qu, D. ^{[2
]}

Checkelsky, J. G. ^{[2
]}

Wray, L. A. ^{[2
]}

Hsieh, D. ^{[2
]}

Xia, Y. ^{[2
]}

Xu, S. -Y. ^{[2
]}

Qian, D. ^{[2
]}

Hasan, M. Z. ^{[2
]}

Ong, N. P. ^{[2
]}

Yazdani, A. ^{[2
]}

Cava, R. J. ^{[1
]}

机构：

[1] Princeton Univ, Dept Chem, Princeton, NJ 08544 USA

[2] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA

来源：

PHYSICAL REVIEW B | 2010年 / 81卷 / 19期

基金：

美国国家科学基金会;

关键词：

PHYSICS;

D O I：

10.1103/PhysRevB.81.195203

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The development of ferromagnetism in Mn-doped Bi2Te3 is characterized through measurements on a series of single crystals with different Mn content. Scanning tunneling microscopy analysis shows that the Mn substitutes on the Bi sites, forming compounds of the type Bi2-xMnxTe3, and that the Mn substitutions are randomly distributed, not clustered. Mn doping first gives rise to local magnetic moments with Curie-like behavior, but by the compositions Bi1.96Mn0.04Te3 and Bi1.91Mn0.09Te3, a second-order ferromagnetic transition is observed, with T(C similar to)9-12 K. The easy axis of magnetization in the ferromagnetic phase is perpendicular to the Bi2Te3 basal plane. Thermoelectric power and Hall effect measurements show that the Mn-doped Bi2Te3 crystals are p-type. Angle-resolved photoemission spectroscopy measurements show that the topological surface states that are present in pristine Bi2Te3 are also present at 15 K in ferromagnetic Mn-doped Bi2-xMnxTe3 and that the dispersion relations of the surface states are changed in a subtle fashion.

引用

页数：7

共 20 条

[1] ON A GENERALISED APPROACH TO 1ST AND 2ND ORDER MAGNETIC TRANSITIONS [J].