Compact and transferable threefold evaporator for molecular beam epitaxy in ultrahigh vacuum

Kury, P.; Hild, R.; Thiện, Đoàn Văn Hồng; Günter, H.‐L.; Heringdorf, F.‐J. Meyer zu; Hoegen, M. Horn‐von

doi:10.1063/1.2001665

Cited by 37 publications

(10 citation statements)

References 31 publications

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“…After cleaning via direct current heating up to 1250°C in several short flash-anneal cycles, the sample was held at an elevated temperature of 650°C. Au was deposited from an electron beam-heated graphite crucible 25 followed by a post annealing step at 850°C 9 . Subsequently the sample was rapidly cooled to liquid nitrogen temperatures.…”

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confidence: 99%

Two-dimensional interaction of spin chains in the Si(553)-Au nanowire system

et al. 2016

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confidence: 99%

Two-dimensional interaction of spin chains in the Si(553)-Au nanowire system

et al. 2016

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“…Ag is deposited from a home-made transferable evaporation cell with an e-beam heated molybdenum crucible. 21,22 In addition to single-crystalline Ag(111) islands, in the temperature range close to 500 C, also bi-crystalline islands form by self-assembly. 19 They are a composition of a Ag(111) part and a Ag(001) part, which can be identified easily in PEEM by their different photoemission yield.…”

Section: Methodsmentioning

confidence: 99%

Lattice dependent motion of voids during electromigration

Sindermann

Latz

Dumpich

et al. 2013

Journal of Applied Physics

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The influence of the crystal lattice configuration to electromigration processes, e.g., void formation and propagation, is investigated in suitable test structures. They are fabricated out of self-assembled, bi-crystalline Ag islands, grown epitaxially on a clean Si(111) surface. The μm-wide and approximately 100 nm thick Ag islands are a composition of a Ag(001) and a Ag(111) part. By focused ion beam milling, they are structured into wires with a single grain boundary, the orientation of which can be chosen arbitrarily. In-situ scanning electron microscopy (SEM) allows to capture an image sequence during electrical stressing and monitors the development of voids and hillocks in time. To visualize the position and motion of voids, we calculate void maps using a threshold algorithm. Most of the information from the SEM image sequence is compressed into one single image. Our present electromigration studies are based on in-situ SEM investigations for three different lattice configurations: Ag(001) (with electron current flow in [1¯1¯0] direction), Ag(111) (with electron current flow in [112¯] direction), and additionally 90∘ rotated Ag(111) (with electron current flow in [1¯10] direction). Our experimental results show that not only the formation and shape but also the motion direction of voids strongly depends on the crystal orientation.

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“…Prior to deposition the sample was degassed at 650 • C for several hours. The sample was cleaned in several short flash-anneal cycles by heating via direct current to 1250 • C. An amount of 0.48 ML (monolayer, referred to the atomic density of a Si(111) surface, i.e., 1 ML = 7.83 • 10 14 atoms/cm 2 ) Au was deposited from an electron beam heated graphite crucible [17] at a substrate temperature of 650 • C. The deposition was fol-lowed by a post annealing step [18] at 850 • C for several seconds and subsequent rapid cooling to a temperature of T = 60 K or T = 80 K, respectively. Figure 1 (a,b) show a schematic structure model of the Si(553)-Au system.…”

Section: Methods and Sample Systemmentioning

confidence: 99%

Adsorbate induced manipulation of 1D atomic nanowires: Soliton mediated degradation of long-range order in the Si(553)-Au system

Hafke,

Witte,

Hoegen

2019

Preprint

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Deposition of Au on vicinal Si(553) surfaces results in the self-assembly of one-dimensional (1D) Au atomic wires. Charge transfer from the Au wire to the Si step edge leads to a chain of Si danglingbond orbitals with a long range ordered threefold periodicity along the steps and finite interchain interaction perpendicular to the steps. Employing spot-profile analysis low-energy electron diffraction (SPA-LEED) we observed a broadening of spot width with time, reflecting the degradation of Si dangling bond chain and Au wire length. Adsorbates were identified as primary source for spot broadening. They force the generation of solitons and anti-solitons which immediately destroy the long-range order along and perpendicular to the steps, respectively. From the temporal evolution of broadening, we conclude that the Au wires are less reactive to adsorption than the Si dangling bond chains.

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Compact and transferable threefold evaporator for molecular beam epitaxy in ultrahigh vacuum

Cited by 37 publications

References 31 publications

Two-dimensional interaction of spin chains in the Si(553)-Au nanowire system

Two-dimensional interaction of spin chains in the Si(553)-Au nanowire system

Lattice dependent motion of voids during electromigration

Adsorbate induced manipulation of 1D atomic nanowires: Soliton mediated degradation of long-range order in the Si(553)-Au system

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