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  Anisotropic large diamagnetism in Dirac semimetals ZrTe5 and HfTe5

Singh, S., Kumar, N., Roychowdhury, S., Shekhar, C., & Felser, C. (2022). Anisotropic large diamagnetism in Dirac semimetals ZrTe5 and HfTe5. Journal of Physics: Condensed Matter, 34(22): 225802, pp. 1-6. doi:10.1088/1361-648X/ac5d19.

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 Creators:
Singh, Sukriti1, Author              
Kumar, Nitesh1, Author              
Roychowdhury, Subhajit1, Author              
Shekhar, Chandra2, Author              
Felser, Claudia3, Author              
Affiliations:
1Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
2Chandra Shekhar, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863428              
3Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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 Abstract: Dirac semimetals, e.g., ZrTe5 and HfTe5, have been widely investigated and have exhibited various exotic physical properties. Nevertheless, several properties of these compounds, including diamagnetism, are still unclear. In this study, we measured the temperature- and field-dependent diamagnetism of ZrTe5 and HfTe5 along all three crystallographic axes (a-, b-, and c-axis). The temperature-dependent magnetization shows an anomaly, which is a characteristic of Dirac crossing. Diamagnetic signal reaches the highest value of 17.3 x 10(-4) emu mol(-1) Oe(-1) along the van der Waals layers, i.e., the b-axis. However, the diamagnetism remains temperature-independent along the other two axes. The field-dependent diamagnetic signal grows linearly without any sign of saturation and maintains a large value along the b-axis. Interestingly, the observed diamagnetism is anisotropic like other physical properties of these compounds and is strongly related to the effective mass, indicating the dominating contribution of orbital diamagnetism in Dirac semimetals induced by interband effects. ZrTe5 and HfTe5 show one of the largest diamagnetic value among previously reported state-of-the-art topological semimetals. Our present study adds another important experimental aspect to characterize nodal crossing and search for other topological materials with large magnetic susceptibility.

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Language(s): eng - English
 Dates: 2022-04-012022-04-01
 Publication Status: Published in print
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 Rev. Type: -
 Identifiers: ISI: 000777010400001
DOI: 10.1088/1361-648X/ac5d19
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Title: Journal of Physics: Condensed Matter
  Abbreviation : J. Phys. Condens. Matter.
Source Genre: Journal
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Publ. Info: Bristol : IOP Publishing
Pages: - Volume / Issue: 34 (22) Sequence Number: 225802 Start / End Page: 1 - 6 Identifier: ISSN: 0953-8984
CoNE: https://pure.mpg.de/cone/journals/resource/954928562478