Large magnetoresistance and quantum oscillations in Sn0.05Pb0.95Te

K. Shrestha, D. Miertschin, R. Sankar, B. Lorenz, C. W. Chu

Research output: Contribution to journalArticlepeer-review

Abstract

We have synthesized high-quality single crystals of Sn x Pb1-x Te and carried out detailed studies of the magnetotransport properties of one of the samples, Sn0.05Pb0.95Te. Longitudinal magnetoresistance increases almost linearly with increasing applied field (H) and reaches ∼310% at H = 13 T. At higher fields, both longitudinal and Hall resistance show clear Shubnikov de Haas oscillations. The oscillations are smooth and periodic, and there exists only one frequency, f α ∼ 57 T. However, an additional frequency, f β ∼ 69 T, appears as the angle between the field direction and the normal to the sample surface (θ) is increased. Both f α and f β exhibit θ-dependence; f α decreases whereas f β increases gradually with increasing θ. The presence of two frequencies in Sn0.05Pb0.95Te indicates that there exist two Fermi surface pockets (α and β pockets). We have constructed the Landau-level fan plot and determined the Berry phase (δ) for the α pocket to be δ ∼ 0.1. This δ value is very close to the expected value of 0 for a topologically trivial system.

Original languageEnglish
Article number335501
JournalJournal of Physics Condensed Matter
Volume33
Issue number33
DOIs
Publication statusPublished - 2021 Aug

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

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