Direct Observation of Broken Time-Reversal Symmetry on the Surface of a Magnetically Doped Topological Insulator

被引：137

作者：

Okada, Yoshinori ^{[1
]}

Dhital, Chetan ^{[1
]}

Zhou, Wenwen ^{[1
]}

Huemiller, Erik D. ^{[1
]}

Lin, Hsin ^{[2
]}

Basak, S. ^{[2
]}

Bansil, A. ^{[2
]}

Huang, Y. -B. ^{[3
,4
]}

Ding, H. ^{[3
,4
]}

Wang, Z. ^{[1
]}

Wilson, Stephen D. ^{[1
]}

Madhavan, V. ^{[1
]}

机构：

[1] Boston Coll, Dept Phys, Chestnut Hill, MA 02467 USA

[2] Northeastern Univ, Dept Phys, Boston, MA 02115 USA

[3] Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[4] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 106卷 / 20期

基金：

美国国家科学基金会;

关键词：

STATES; BI2TE3;

D O I：

10.1103/PhysRevLett.106.206805

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study interference patterns of a magnetically doped topological insulator Bi2-xFexTe3+d by using Fourier transform scanning tunneling spectroscopy and observe several new scattering channels. A comparison with angle-resolved photoemission spectroscopy allows us to unambiguously ascertain the momentum-space origin of distinct dispersing channels along high-symmetry directions and identify those originating from time-reversal symmetry breaking. Our analysis also reveals that the surface state survives far above the energy where angle-resolved photoemission spectroscopy finds the onset of continuum bulk bands.

引用

页数：4

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