Quantum Oscillations at Integer and Fractional Landau Level Indices in Single-Crystalline ZrTe5

被引：0
作者：
W. Yu
Y. Jiang
J. Yang
Z. L. Dun
H. D. Zhou
Z. Jiang
P. Lu
W. Pan
机构：
[1] Sandia National Laboratories,Department of Physics and Astronomy
[2] Albuquerque,undefined
[3] School of Physics,undefined
[4] Georgia Institute of Technology,undefined
[5] University of Tennessee,undefined
来源：
Scientific Reports | / 6卷
关键词：
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A three-dimensional (3D) Dirac semimetal (DS) is an analogue of graphene, but with linear energy dispersion in all (three) momentum directions. 3D DSs have been a fertile playground in discovering novel quantum particles, for example Weyl fermions, in solid state systems. Many 3D DSs were theoretically predicted and experimentally confirmed. We report here the results in exfoliated ZrTe5 thin flakes from the studies of aberration-corrected scanning transmission electron microscopy and low temperature magneto-transport measurements. Several unique results were observed. First, a π Berry phase was obtained from the Landau fan diagram of the Shubnikov-de Haas oscillations in the longitudinal conductivity σxx. Second, the longitudinal resistivity ρxx shows a linear magnetic field dependence in the quantum limit regime. Most surprisingly, quantum oscillations were also observed at fractional Landau level indices N = 5/3 and 7/5, demonstrating strong electron-electron interaction effects in ZrTe5.
引用
收藏
相关论文
共 111 条
  • [1] Novoselov KS(2005)Two-dimensional gas of massless Dirac fermions in graphene Nature 438 197-200
  • [2] Geim AK(2005)Experimental observation of the quantum Hall effect and Berry’s phase in graphene Nature 438 201-204
  • [3] Morozov SV(2011)Topological semimetal and Fermi-arc surface states in the electronic structure of pyrochlore iridates Phys. Rev. B 83 205101-681
  • [4] Jiang D(2012)Dirac semimetal in three dimensions Phys. Rev. Lett. 108 140405-554
  • [5] Katsnelson MI(2012)Dirac semimetal and topological phase transitions in A Phys. Rev. B 85 195320-867
  • [6] Grigorieva IV(2013)Bi(A = Na, K, Rb) Phys. Rev. B 88 125427-298
  • [7] Dubonos SV(2014)Three-dimensional Dirac semimetal and quantum transport in Cd Nat. Mater. 13 677-840
  • [8] Firsov AA(2014)As Phys. Rev. Lett. 113 027603-798
  • [9] Zhang Y(2016)A stable three-dimensional topological Dirac semimetal Cd Nat. Phys. 12 550-2367
  • [10] Tan Y-W(2014)As Science 343 864-689
12345678910