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

Article

关键词: DENSITY-OF-STATES;    PHOTOELECTRON;    PHOTOEMISSION;    GROWTH;    SPECTROSCOPY;    TRANSPORT;    SPECTRA;    METALS;    AUGER;    TB;   

DOI  :  10.1103/PhysRevB.91.235116

来源: SCIE

【 摘 要 】

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.

【 授权许可】

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