title: Two-dimensional Fermi surfaces in Kondo insulator SmB₆.
abstract: 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.
authors.affiliation: Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA.
authors.forename: G
authors.initials: G
authors.lastname: Li
authors.affiliation: Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA. Hefei National Laboratory for Physical Science at Microscale and Department of Physics, University of Science and Technology of China, Hefei Anhui 230026, China.
authors.forename: Z
authors.initials: Z
authors.lastname: Xiang
authors.affiliation: Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA.
authors.forename: F
authors.initials: F
authors.lastname: Yu
authors.affiliation: Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA.
authors.forename: T
authors.initials: T
authors.lastname: Asaba
authors.affiliation: Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA.
authors.forename: B
authors.initials: B
authors.lastname: Lawson
authors.affiliation: Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA. Department of Physics, Tsinghua University, Beijing, China.
authors.forename: P
authors.initials: P
authors.lastname: Cai
authors.affiliation: Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA.
authors.forename: C
authors.initials: C
authors.lastname: Tinsman
authors.affiliation: Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA.
authors.forename: A
authors.initials: A
authors.lastname: Berkley
authors.affiliation: Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA.
authors.forename: S
authors.initials: S
authors.lastname: Wolgast
authors.affiliation: Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA.
authors.forename: Y S
authors.initials: YS
authors.lastname: Eo
authors.affiliation: Department of Physics and Astronomy, University of California at Irvine, Irvine, CA 92697, USA.
authors.forename: Dae-Jeong
authors.initials: DJ
authors.lastname: Kim
authors.affiliation: Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA.
authors.forename: C
authors.initials: C
authors.lastname: Kurdak
authors.affiliation: Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA.
authors.forename: J W
authors.initials: JW
authors.lastname: Allen
authors.affiliation: Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA.
authors.forename: K
authors.initials: K
authors.lastname: Sun
authors.affiliation: Hefei National Laboratory for Physical Science at Microscale and Department of Physics, University of Science and Technology of China, Hefei Anhui 230026, China.
authors.forename: X H
authors.initials: XH
authors.lastname: Chen
authors.affiliation: Department of Physics, Tsinghua University, Beijing, China.
authors.forename: Y Y
authors.initials: YY
authors.lastname: Wang
authors.affiliation: Department of Physics and Astronomy, University of California at Irvine, Irvine, CA 92697, USA.
authors.forename: Z
authors.initials: Z
authors.lastname: Fisk
authors.affiliation: Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA. luli@umich.edu.
authors.forename: Lu
authors.initials: L
authors.lastname: Li