Spilling of electronic states in Pb quantum wells

Jałochowski, M.; Palotás, Krisztián; Krawiec, Mariusz

doi:10.1103/physrevb.93.035437

Cited by 8 publications

(9 citation statements)

References 57 publications

(68 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is a consequence of the surface recrystallization of Pb atoms and formation of even-ML-thick areas (islands) at the surface. Such structure were observed in the STM measurements in our laboratories [35] for somewhat higher temperature (180 K). These Pb flat areas are relatively large (tens of nm), they are very stable and do not change with heating or cooling of the sample between liquid nitrogen temperature (LNT) and room temperature (RT).…”

Section: Resultssupporting

confidence: 70%

“…RHEED diffraction pictures were used to control the surface crystalline order. However, the detailed morphology of Pb at Si(111)-6 × 6Au surface was supported by the scanning tunneling microscopy (STM) topographic images obtained earlier in the literature [33,35,37,38].…”

Section: Resultsmentioning

confidence: 58%

“…This function is responsible for the reconstruction of deposited atoms and formation of flat Pb areas at the surface (and is correlated with the STM topography images e.g. [33,35,37,38]). At low temperature deposited atoms are placed randomly at the surface and their positions change with temperature.…”

Section: Theoretical Descriptionmentioning

confidence: 77%

“…For somewhat larger coverages, just after deposition, Pb atoms form irregular structures (see the left inset in Fig. 4) and, as the temperature increases, the surface becomes flatter and flatter with even-ML steps (see the right inset) [35]. In this case we express the roughness function in the form of 3rd order polynomial, Fig.…”

Section: Theoretical Descriptionmentioning

confidence: 99%

“…However, very little attention has been paid on thermal annealing of ultrathin Pb films on Si(111)-6 × 6Au crystal reconstruction. Such a substrate reveals a metallic-like character due to high-density Au domain walls forming this superstructure and provides regular layer-by-layer Pb growth mode [6,29,[33][34][35]. Then it is rather desirable, even from a practical point of view, to measure temperature characteristics of the conductance for this substrate.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Thermal Annealing of Pb Films on Modified Silicon Surface: Electrical Conductance Measurement

Korczak

Kwapiński

2018

Acta Phys. Pol. A

View full text Add to dashboard Cite

The electron transport properties of thin Pb films on Si(111)-(6 × 6)Au surface are studied experimentally using the four-point probe method and reflection high-energy electron diffraction system in UHV condition. We have measured the electrical conductance of the substrate with deposited at liquid nitrogen temperature Pb atoms during annealing and cooling down. We have found that the conductance increases during this process and from comparison of both heating and cooling curves the Pb recrystallization temperature was determined. Moreover, it was shown that 4 ML thick Pb film reveals temperature dependence of the conductance corresponding to the metallic bulk structure with the temperature coefficient of resistivity equal to 0.0036 1/K. To describe theoretically the conductance of thin Pb films the modified Trivedi-Ashcroft theory with temperature dependence of the roughness function was used in our calculations.

show abstract

Section: Resultssupporting

confidence: 70%

Section: Resultsmentioning

confidence: 58%

Section: Theoretical Descriptionmentioning

confidence: 77%

Section: Theoretical Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Thermal Annealing of Pb Films on Modified Silicon Surface: Electrical Conductance Measurement

Korczak

Kwapiński

2018

Acta Phys. Pol. A

View full text Add to dashboard Cite

show abstract

Coexistence of two gold-induced one-dimensional structures on a single terrace of the Si(11 11 13)

Stȩpniak-Dybala

Kopciuszyński

Jałochowski

et al. 2022

Applied Surface Science

View full text Add to dashboard Cite

Two-dimensional silica opens new perspectives

Büchner

Heyde

2017

Progress in Surface Science

View full text Add to dashboard Cite

In recent years, silica films have emerged as a novel class of two-dimensional (2D) materials. Several groups succeeded in epitaxial growth of ultrathin SiO₂ layers using different growth methods and various substrates. The structures consist of tetrahedral [SiO₄] building blocks in two mirror symmetrical planes, connected via oxygen bridges. This arrangement is called a silica bilayer as it is the thinnest 2D arrangement with the stoichiometry SiO₂ known today. With all bonds saturated within the nano-sheet, the interaction with the substrate is based on van der Waals forces. Complex ring networks are observed, including hexagonal honeycomb lattices, point defects and domain boundaries, as well as amorphous domains. The network structures are highly tuneable through variation of the substrate, deposition parameters, cooling procedure, introducing dopants or intercalating small species. The amorphous networks and structural defects were resolved with atomic resolution microscopy and modeled with density functional theory and molecular dynamics. Such data contribute to our understanding of the formation and characteristic motifs of glassy systems. Growth studies and doping with other chemical elements reveal ways to tune ring sizes and defects as well as chemical reactivities. The pristine films have been utilized as molecular sieves and for confining molecules in nanocatalysis. Post growth hydroxylation can be used to tweak the reactivity as well. The electronic properties of silica bilayers are favourable for using silica as insulators in 2D material stacks. Due to the fully saturated atomic structure, the bilayer interacts weakly with the substrate and can be described as quasi-freestanding. Recently, a mm-scale film transfer under structure retention has been demonstrated. The chemical and mechanical stability of silica bilayers is very promising for technological applications in 2D heterostacks. Due to the impact of this bilayer system for glass science, catalysis and the field of 2D materials, a large number of theoretical and experimental studies on silica bilayers have been reported in the last years. This review aims to provide an overview on the insights gained on this material and to point out opportunities for further discovery in various fields

show abstract

Spilling of electronic states in Pb quantum wells

Cited by 8 publications

References 57 publications

Thermal Annealing of Pb Films on Modified Silicon Surface: Electrical Conductance Measurement

Thermal Annealing of Pb Films on Modified Silicon Surface: Electrical Conductance Measurement

Coexistence of two gold-induced one-dimensional structures on a single terrace of the Si(11 11 13)

Two-dimensional silica opens new perspectives

Contact Info

Product

Resources

About