Romain Bernard
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Honeycomb germanene flakes on Ag nano-islands Open
Since germanene cannot be exfoliated from a bulk material, and since Ge-based surface alloys are more stable than pure Ge monolayers (MLs) on metal surfaces, the synthesis of germanene flakes remains challenging. Here we report on the synt…
View article: Encoding information onto the charge and spin state of a paramagnetic atom using MgO tunnelling spintronics
Encoding information onto the charge and spin state of a paramagnetic atom using MgO tunnelling spintronics Open
An electrical current that flows across individual atoms can generate exotic quantum transport signatures in model junctions built using atomic tip or lateral techniques. So far, however, a viable industrial pathway for atom-driven devices…
The Ground State of Epitaxial Germanene on Ag(111) Open
Two-dimensional (2D) honeycomb lattices beyond graphene, such as germanene, appear very promising due to their outstanding electronic properties, such as the quantum spin Hall effects. While there have been many claims of germanene monolay…
View article: Wafer-sized WS<sub>2</sub> monolayer deposition by sputtering
Wafer-sized WS<sub>2</sub> monolayer deposition by sputtering Open
Radio frequency sputtering by argon ions on a target consisting of tungsten disulphide can create a single layer of the compound on a 4′′ Si-wafer with one W atom per two S atoms when including hydrogen sulphide in the sputtering atmospher…
Plasmonic Resonant Nanoantennas Induce Changes in the Shape and the Intensity of Infrared Spectra of Phospholipids Open
Surface enhanced infrared absorption spectroscopic studies (SEIRAS) as a technique to study biological molecules in extremely low concentrations is greatly evolving. In order to use the technique for identification of the structure and int…
View article: Quantum advantage in a spintronic engine with coherently coupled ultrafast strokes using molecular superexchange.
Quantum advantage in a spintronic engine with coherently coupled ultrafast strokes using molecular superexchange. Open
Recent theory and experiments have showcased how to harness quantum mechanics to assemble heat/information engines with efficiencies that surpass the classical Carnot limit. So far, implementing work-producing quantum resources has require…
Structure of germanene/Al(111): a two-layers surface alloy Open
Unlike silicene, for which the demonstration of its existence has been done through numerous independent studies, the possibility of growing epitaxial germanene remains highly controversial. It has been recently shown by scanning tunneling…
Structure of Germanene/Al(111): A Two-Layer Surface Alloy Open
Unlike silicene, for which the demonstration of its existence has been done through numerous independent studies, the possibility of growing epitaxial germanene remains highly controversial. It has been recently shown by scanning tunneling…
Demonstration of the Existence of Dumbbell Silicene: A Stable Two-Dimensional Allotrope of Silicon Open
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View article: Growth of two-dimensional WS2 thin films by reactive sputtering
Growth of two-dimensional WS2 thin films by reactive sputtering Open
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View article: Quantum advantage in a molecular spintronic engine that harvests thermal fluctuation energy
Quantum advantage in a molecular spintronic engine that harvests thermal fluctuation energy Open
Recent theory and experiments have showcased how to harness quantum mechanics to assemble heat/information engines with efficiencies that surpass the classical Carnot limit. So far, this has required atomic engines that are driven by cumbe…
Spintronic harvesting of thermal fluctuations on paramagnetic molecular centers around a phase transition Open
Experiments and theory are reexamining how the laws of thermodynamics are expressed in a quantum world. Most quantum thermodynamics research is performed at sub-Kelvin temperatures to prevent thermal fluctuations from smearing the mesoscop…
Growth of germanium-silver surface alloys followed by <i>in situ</i> scanning tunneling microscopy: Absence of germanene formation Open
Theoretical studies have shown that new physical properties such as tunable\ngap openings or quantum spinHall effects could be expected from group-IV\ngraphene analogs (silicene, germanene, stanene). While therehave been numerous\nstudies …
View article: Structure and stability of silicene on Ag(111) reconstructions from grazing incidence x-ray diffraction and density functional theory
Structure and stability of silicene on Ag(111) reconstructions from grazing incidence x-ray diffraction and density functional theory Open
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Resolving the Controversial Existence of Silicene and Germanene Nanosheets Grown on Graphite Open
The highly oriented pyrolytic graphite (HOPG) surface, consisting of a dangling bond-free lattice, is regarded as a potential substrate for van der Waals heteroepitaxy of two-dimensional layered materials. In this work, the growth of silic…
Transition from silicene monolayer to thin Si films on Ag(111): comparison between experimental data and Monte Carlo simulation Open
Scanning tunneling microscopy (STM), Auger electron spectroscopy (AES) and low energy electron diffraction have been used to follow the growth of Si films on Ag(111) at various temperatures. Using a simple growth model, we have simulated t…
View article: The mechanism for the stabilization and surfactant properties of epitaxial silicene
The mechanism for the stabilization and surfactant properties of epitaxial silicene Open
Using real-time in situ scanning tunneling microscopy and density functional theory simulations, we have studied the growth of Si films on Ag(111) beyond the silicene monolayer, evidencing the existence of metastable phases and an original…
View article: Multilayer silicene: clear evidence of Ag-terminated bulk silicon
Multilayer silicene: clear evidence of Ag-terminated bulk silicon Open
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Publisher’s Note: Si Nanoribbons on Ag(110) Studied by Grazing-Incidence X-Ray Diffraction, Scanning Tunneling Microscopy, and Density-Functional Theory: Evidence of a Pentamer Chain Structure [Phys. Rev. Lett. <b>117</b>, 276102 (2016)] Open
This corrects the article DOI: 10.1103/PhysRevLett.117.276102.
Si Nanoribbons on Ag(110) Studied by Grazing-Incidence X-Ray Diffraction, Scanning Tunneling Microscopy, and Density-Functional Theory: Evidence of a Pentamer Chain Structure Open
International audience