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Anderson localization of electron states in a quasicrystal
- Source :
- Physical Review B, Physical Review B, American Physical Society, 2021, 103 (24), ⟨10.1103/PhysRevB.103.L241106⟩, Physical review / B 103(24), L241106 (2021). doi:10.1103/PhysRevB.103.L241106
- Publication Year :
- 2021
- Publisher :
- Deutsches Elektronen-Synchrotron, DESY, Hamburg, 2021.
-
Abstract
- Physical review / B 103(24), L241106 (2021). doi:10.1103/PhysRevB.103.L241106<br />The influence of disorder on the critical electron states in a quasiperiodic lattice is a subject of intense research. In this work, we report the occurrence of Anderson localization in an icosahedral (i) polygrain quasicrystal Al-Pd-Re due to site disorder using hard x-ray photoemission spectroscopy, resistivity, and density functional theory (DFT). Photoemission spectroscopy shows that the density of states is enhanced at the Fermi level in polygrain i-Al-Pd-Re compared to single-grain i-Al-Pd-Re. In contrast, the conductivity of the former is an order of magnitude reduced compared to the latter, indicating that these electron states are localized. DFT shows that these states originate primarily from Re 5d-Pd 4d hybridization and are enhanced in polygrain i-Al-Pd-Re due to compositional difference, but are broadened because of disorder that brings about Anderson localization. This is established by the Mott variable range hopping behavior of conductivity, and the estimated localization length is 23 Å.<br />Published by Inst., Woodbury, NY
- Subjects :
- Physics
Anderson localization
Condensed matter physics
Photoemission spectroscopy
Fermi level
Quasicrystal
02 engineering and technology
021001 nanoscience & nanotechnology
01 natural sciences
Variable-range hopping
symbols.namesake
Quasiperiodic function
0103 physical sciences
symbols
Density of states
[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]
ddc:530
Density functional theory
010306 general physics
0210 nano-technology
ComputingMilieux_MISCELLANEOUS
Subjects
Details
- Language :
- English
- ISSN :
- 24699950 and 24699969
- Database :
- OpenAIRE
- Journal :
- Physical Review B, Physical Review B, American Physical Society, 2021, 103 (24), ⟨10.1103/PhysRevB.103.L241106⟩, Physical review / B 103(24), L241106 (2021). doi:10.1103/PhysRevB.103.L241106
- Accession number :
- edsair.doi.dedup.....6d2710ba7a2ed8525f6fef4742127372
- Full Text :
- https://doi.org/10.3204/pubdb-2021-03883