Continuous crossover from two-dimensional to one-dimensional electronic properties for metallic silicide nanowires
(2020) In Physical Review B 102(11).- Abstract
In a joint experimental and theoretical study on metallic TbSi2 nanowires, we observe a continuous crossover from a two-dimensional (2D) to a quasi-one-dimensional (1D) electronic structure by reduction of the nanowire width. The nanowires were grown by self-organization on vicinal Si(111) substrates denoted by the Miller indices (hhk). Their electronic structure was analyzed by angle-resolved photoemission spectroscopy (ARPES) and calculated using density functional theory (DFT). In ARPES, the TbSi2 nanowires show basically the 2D electronic structure of the TbSi2 film on planar Si(111) with an increasing momentum broadening for decreasing nanowire widths, consistent with Heisenberg's uncertainty principle. In contrast, DFT... (More)
In a joint experimental and theoretical study on metallic TbSi2 nanowires, we observe a continuous crossover from a two-dimensional (2D) to a quasi-one-dimensional (1D) electronic structure by reduction of the nanowire width. The nanowires were grown by self-organization on vicinal Si(111) substrates denoted by the Miller indices (hhk). Their electronic structure was analyzed by angle-resolved photoemission spectroscopy (ARPES) and calculated using density functional theory (DFT). In ARPES, the TbSi2 nanowires show basically the 2D electronic structure of the TbSi2 film on planar Si(111) with an increasing momentum broadening for decreasing nanowire widths, consistent with Heisenberg's uncertainty principle. In contrast, DFT calculations predict a purely 1D electronic structure for TbSi2 nanowires. Unfolding this 1D electronic structure onto the Brillouin zone of the TbSi2 film leads to a Fermi surface appearing similar to the one of the 2D TbSi2 film, but with an additional 1D contribution from nanowire edges. Such an additional 1D signature is also observed in ARPES for narrow nanowires. These results indicate a continuous transition to a 1D electronic structure for decreasing nanowire widths.
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- author
- Appelfeller, Stephan LU ; Holtgrewe, Kris ; Franz, Martin ; Freter, Lars ; Hassenstein, Christian ; Jirschik, Hans Ferdinand ; Sanna, Simone and Dähne, Mario
- organization
- publishing date
- 2020
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review B
- volume
- 102
- issue
- 11
- article number
- 115433
- publisher
- American Physical Society
- external identifiers
-
- scopus:85092923210
- ISSN
- 2469-9950
- DOI
- 10.1103/PhysRevB.102.115433
- language
- English
- LU publication?
- yes
- id
- 00742554-4d4b-4f65-b804-7cfe2e6ac54b
- date added to LUP
- 2020-11-10 08:25:50
- date last changed
- 2022-04-19 01:42:38
@article{00742554-4d4b-4f65-b804-7cfe2e6ac54b,
abstract = {{<p>In a joint experimental and theoretical study on metallic TbSi2 nanowires, we observe a continuous crossover from a two-dimensional (2D) to a quasi-one-dimensional (1D) electronic structure by reduction of the nanowire width. The nanowires were grown by self-organization on vicinal Si(111) substrates denoted by the Miller indices (hhk). Their electronic structure was analyzed by angle-resolved photoemission spectroscopy (ARPES) and calculated using density functional theory (DFT). In ARPES, the TbSi2 nanowires show basically the 2D electronic structure of the TbSi2 film on planar Si(111) with an increasing momentum broadening for decreasing nanowire widths, consistent with Heisenberg's uncertainty principle. In contrast, DFT calculations predict a purely 1D electronic structure for TbSi2 nanowires. Unfolding this 1D electronic structure onto the Brillouin zone of the TbSi2 film leads to a Fermi surface appearing similar to the one of the 2D TbSi2 film, but with an additional 1D contribution from nanowire edges. Such an additional 1D signature is also observed in ARPES for narrow nanowires. These results indicate a continuous transition to a 1D electronic structure for decreasing nanowire widths.</p>}},
author = {{Appelfeller, Stephan and Holtgrewe, Kris and Franz, Martin and Freter, Lars and Hassenstein, Christian and Jirschik, Hans Ferdinand and Sanna, Simone and Dähne, Mario}},
issn = {{2469-9950}},
language = {{eng}},
number = {{11}},
publisher = {{American Physical Society}},
series = {{Physical Review B}},
title = {{Continuous crossover from two-dimensional to one-dimensional electronic properties for metallic silicide nanowires}},
url = {{http://dx.doi.org/10.1103/PhysRevB.102.115433}},
doi = {{10.1103/PhysRevB.102.115433}},
volume = {{102}},
year = {{2020}},
}