Quantitative evaluation of Dirac physics in PbTe

Kazuto Akiba, Atsushi Miyake, Hideaki Sakai, Keisuke Katayama, Hiroshi Murakawa, Noriaki Hanasaki, Sadao Takaoka, Yoshiki Nakanishi, Masahito Yoshizawa, Masashi Tokunaga

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The magnetic field dependence of electronic transport, magnetic, and elastic properties in single crystals of PbTe were investigated in high magnetic fields up to 55 T. The magnetoresistance, magnetization, ultrasonic attenuation, and sound velocity showed clear quantum oscillations with pronounced Zeeman splitting, which causes a large second harmonic in the frequency spectra. The ratio of the Zeeman to the cyclotron energy, which is regarded as an index of "Diracness" [H. Hayasaka and Y. Fuseya, J. Phys.: Condens. Matter 28, 31LT01 (2016)10.1088/0953-8984/28/31/31LT01], was determined to be 0.52 and 0.57 in samples with different carrier densities. We also pointed out that the effect of Zeeman splitting seriously affects the Landau-level fan diagram analysis, which is widely used to extract the nontrivial Berry's phase from the quantum oscillations.

Original languageEnglish
Article number115144
JournalPhysical Review B
Volume98
Issue number11
DOIs
Publication statusPublished - Sep 24 2018

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Akiba, K., Miyake, A., Sakai, H., Katayama, K., Murakawa, H., Hanasaki, N., Takaoka, S., Nakanishi, Y., Yoshizawa, M., & Tokunaga, M. (2018). Quantitative evaluation of Dirac physics in PbTe. Physical Review B, 98(11), [115144]. https://doi.org/10.1103/PhysRevB.98.115144