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arXiv · 1805.09691

Observation of Landau quantization and standing waves in HfSiS

L. Jiao·Q. N. Xu·Y. P. Qi·S. -C. Wu·Y. Sun·C. Felser·S. Wirth
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Abstract

Recently, HfSiS was found to be a new type of Dirac semimetal with a line of Dirac nodes in the band structure. Meanwhile, Rashba-split surface states are also pronounced in this compound. Here we report a systematic study of HfSiS by scanning tunneling microscopy/spectroscopy at low temperature and high magnetic field. The Rashba-split surface states are characterized by measuring Landau quantization and standing waves, which reveal a quasi-linear dispersive band structure. First-principles calculations based on density-functional theory are conducted and compared with the experimental results. Based on these investigations, the properties of the Rashba-split surface states and their interplay with defects and collective modes are discussed.

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L. Jiao, Q. N. Xu, Y. P. Qi, S. -C. Wu, Y. Sun, C. Felser, S. Wirth. 2018-05-24. Observation of Landau quantization and standing waves in HfSiS. https://doi.org/10.1103/physrevb.97.195137

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