Pressure tuning of the Berry phase in BaMnSb2

X. Yin, J. Y. Liu, T. Hu, Y. L. Huang, C. Jiang, L. J. Min, P. G. Li, Z. Q. Mao, H. Xiao

Research output: Contribution to journalArticlepeer-review


The Sb square net in BaMnSb2 is reported to host nearly massless Dirac fermions. At ambient pressure, BaMnSb2 shows strong Shubnikov-de Haas (SdH) oscillations with a π Berry phase. In this work, we study BaMnSb2 under different pressures. It is found that the frequency of the SdH oscillation remains almost unchanged, hence the cross-section area of the Fermi surface does not change much with pressure. Notably, there is a sudden change in the phase factor of the oscillations around a critical pressure of P= 2.5 GPa, which suggests a possible topological phase transition in BaMnSb2.

Original languageEnglish (US)
Article number045123
JournalPhysical Review B
Issue number4
StatePublished - Jan 15 2022

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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