Quantum Oscillations at Integer and Fractional Landau Level Indices in ZrTe5
ORAL
Abstract
A three-dimensional (3D) Dirac semimetal (DS) is an analogue of graphene, but with linear energy dispersion in all (three) momentum directions. We report here the results in exfoliated ZrTe$_{\mathrm{5}}$ thin flakes from the studies of scanning transmission electron microscopy and low temperature magneto-transport measurements. Several unique results were observed. First, a $\pi $ Berry phase was obtained from the Landau fan diagram. Second, the longitudinal resistivity shows linear magnetic field dependence. 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 ZrTe$_{\mathrm{5}}$.
*This work was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division. Contract DE-AC04-94AL85000. Grant No. DE-FG02-07ER46451. Grant No. DMR-1350002.
–
Authors
Wenlong Yu
Sandia National Laboratories, Albuquerque, New Mexico 87185, USA
Yuxuan Jiang
School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
School of physics, Georgia Institute of Technology
Jeremy Yang
School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
Zhiling Dun
Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
Haidong Zhou
Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
University of Tennessee
University of Tennessee, Knoxville
University of Tennessee,Knoxville, TN 37996, USA
University of Tennessee, Knoxville, National High Magnetic Field Laboratory
Zhigang Jiang
School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
Ping Lu
Sandia National Laboratories, Albuquerque, New Mexico 87185, USA
Sandia National Laboratories
W. Pan
Sandia National Laboratories, Albuquerque, New Mexico 87185, USA
