Bulk electronic structure of Zn-Mg-Y and Zn-Mg-Dy icosahedral quasicrystals

Nayak, J.; Maniraj, M.; Gloskovskii, A.; Krajčí, M.; Sebastian, S.; Fisher, I. R.; Horn, Karsten; Barman, S. R.

doi:10.1103/PhysRevB.91.235116

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Bulk electronic structure of Zn-Mg-Y and Zn-Mg-Dy icosahedral quasicrystals

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Horn, Karsten
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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PhysRevB.91.235116.pdf
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Citation

Nayak, J., Maniraj, M., Gloskovskii, A., Krajčí, M., Sebastian, S., Fisher, I. R., et al. (2015). Bulk electronic structure of Zn-Mg-Y and Zn-Mg-Dy icosahedral quasicrystals. Physical Review B, 91(23): 235116. doi:10.1103/PhysRevB.91.235116.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0027-9DD8-3

Abstract

We use bulk sensitive hard x-ray photoelectron spectroscopy to provide unambiguous evidence for a pseudogap in the density of states around the Fermi level in icosahedral Zn-Mg-Y and Zn-Mg-Dy quasicrystals, in agreement with our density functional theory calculations. The pseudogap in these Zn-based quasicrystals is less pronounced compared to the Al-based ones such as Al-Pd-Mn and Al-Cu-Fe [J. Nayak et al., Phys. Rev. Lett. 109, 216403 (2012)]. This observation is in agreement with transport studies that indicate a larger charge carrier concentration in the Zn-based quasicrystals. Compared to Zn-Mg-Dy, the pseudogap is somewhat deeper in Zn-Mg-Y. The larger width of the Mg 1s and Zn 2p core-level spectra in Zn-Mg-Y is explained by different configurations of the local atomic surrounding compared to Zn-Mg-Dy.