期刊
SCIENCE
卷 346, 期 6214, 页码 1208-1212出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1250366
关键词
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资金
- U. S. Department of Energy (DOE) [DE-SC0008110]
- startup fund at the University of Michigan (low-field magnetization characterization)
- Mcubed project at the University of Michigan (low-field magnetization characterization)
- NSF [DMR-0801253, DMR-1006500, ECCS-1307744, F031543, DMR-084173]
- Univ. of California-Irvine CORCL grant [MIIG-2011-12-8]
- China Scholarship Council
- National Basic Research Program of China (973 Program) [2012CB922002]
- Nakajima Foundation Scholarship
- NSF
- State of Florida
- DOE
- Direct For Mathematical & Physical Scien [1006500] Funding Source: National Science Foundation
- Directorate For Engineering [1307744] Funding Source: National Science Foundation
- Division Of Materials Research [1006500] Funding Source: National Science Foundation
- Div Of Electrical, Commun & Cyber Sys [1307744] Funding Source: National Science Foundation
- U.S. Department of Energy (DOE) [DE-SC0008110] Funding Source: U.S. Department of Energy (DOE)
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.
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