With the rise of sulfides, selenides, tellurides and other materials, more and more academic articles on these chemicals have been published. Recently, three-dimensional topological Dirac semimetal materials have become popular, which is a hot spot in the field of condensed matter and materials science. important value. Earlier studies have shown that the layered material ZrTe5 is an excellent thermoelectric material, while recent angle-resolved photoelectron spectroscopy and infrared spectroscopy measurements suggest that the material may be a three-dimensional Dirac semimetal. However, there is no conclusive evidence of electrical transport in related researches.

By analyzing the quantum oscillation behavior in ZrTe5, the researchers confirmed that the electrons in the sample have high mobility, very light effective mass, and a non-trivial Berry phase. The corner magnetoresistance measurements revealed that these Dirac electrons have distinct three-dimensional characteristics. At the same time, the researchers further measured the quantum oscillation behavior in the sample under a strong magnetic field (31T) and extremely low temperature (300mK), and found that due to the Landau level splitting effect, these quantum oscillation peaks split with the decrease of temperature. It indicates that the Dirac point in the material may be split into two Weyl points due to the time-reversal symmetry breaking. These studies show that layered ZrTe5 material is an ideal material system for the study of three-dimensional Dirac semimetals.

Tian Mingliang, a researcher at the High Magnetic Field Science Center of the Chinese Academy of Sciences, has made important progress in the study of three-dimensional Dirac semimetals with the support of a water-cooled magnet and an extremely low temperature test system for the steady-state high magnetic field experimental device. The relevant research results were published online in Physical Review B superior.

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