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

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep35357· OSTI ID:1332915
 [1];  [2];  [2];  [3];  [3];  [2];  [1];  [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. Georgia Inst. of Technology, Atlanta, GA (United States). School of Physics
  3. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy

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. Here, 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. We observed several unique results. 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.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC04-94AL85000; DMR-1350002; FG02-07ER46451
OSTI ID:
1332915
Report Number(s):
SAND2016-10784J; srep35357; TRN: US1601868
Journal Information:
Scientific Reports, Vol. 6; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 26 works
Citation information provided by
Web of Science

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Cited By (5)

Type I superconductivity in Dirac materials journal July 2018
Possible manifestations of the chiral anomaly and evidence for a magnetic field induced topological phase transition in the type-I Weyl semimetal TaAs journal September 2019
Magnetic properties of type-I and type-II Weyl semimetals in the superconducting state journal April 2018
The Property, Preparation and Application of Topological Insulators: A Review journal July 2017
Type I superconductivity in Dirac materials text January 2018

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