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

被引：15

作者：

Nayak, J. ^{[1
]}

Maniraj, M. ^{[1
]}

Gloskovskii, A. ^{[2
]}

Krajci, M. ^{[3
]}

Sebastian, S. ^{[4
,5
]}

Fisher, I. R. ^{[4
,5
]}

Horn, K. ^{[6
]}

Barman, S. R. ^{[1
]}

机构：

[1] UGC DAE Consortium Sci Res, Indore 452001, Madhya Pradesh, India

[2] DESY, D-22607 Hamburg, Germany

[3] Slovak Acad Sci, Inst Phys, SK-84511 Bratislava, Slovakia

[4] Stanford Univ, Geballe Lab Adv Mat, Stanford, CA 94305 USA

[5] Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA

[6] Max Planck Gesell, Fritz Haber Inst, D-14195 Berlin, Germany

来源：

PHYSICAL REVIEW B | 2015年 / 91卷 / 23期

关键词：

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

D O I：

10.1103/PhysRevB.91.235116

中图分类号：

T [工业技术];

学科分类号：

08 ;

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.

引用

页数：6

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