Two-dimensional Fermi surfaces in Kondo insulator SmB6

被引：268

作者：

Li, G. ^{[1
]}

Xiang, Z. ^{[1
,2
,3
]}

Yu, F. ^{[1
]}

Asaba, T. ^{[1
]}

Lawson, B. ^{[1
]}

Cai, P. ^{[1
,4
]}

Tinsman, C. ^{[1
]}

Berkley, A. ^{[1
]}

Wolgast, S. ^{[1
]}

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

Kim, Dae-Jeong ^{[5
]}

Kurdak, C. ^{[1
]}

Allen, J. W. ^{[1
]}

Sun, K. ^{[1
]}

Chen, X. H. ^{[2
,3
]}

Wang, Y. Y. ^{[4
]}

Fisk, Z. ^{[5
]}

Li, Lu ^{[1
]}

机构：

[1] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA

[2] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China

[3] Univ Sci & Technol China, Dept Phys, Hefei 230026, Anhui, Peoples R China

[4] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China

[5] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA

来源：

SCIENCE | 2014年 / 346卷 / 6214期

基金：

美国国家科学基金会;

关键词：

TOPOLOGICAL INSULATOR; STATES; TRANSPORT; PHASE; GAS;

D O I：

10.1126/science.1250366

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

In the Kondo insulator samarium hexaboride (SmB6), strong correlation and band hybridization lead to an insulating gap and a diverging resistance at low temperature. The resistance divergence ends at about 3 kelvin, a behavior that may arise from surface conductance. We used torque magnetometry to resolve the Fermi surface topology in this material. The observed oscillation patterns reveal two Fermi surfaces on the (100) surface plane and one Fermi surface on the (101) surface plane. The measured Fermi surface cross sections scale as the inverse cosine function of the magnetic field tilt angles, which demonstrates the two-dimensional nature of the conducting electronic states of SmB6.

引用

页码：1208 / 1212

页数：5

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