Project

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Geometrical and electronic structure at and near surfaces

English title Geometrical and electronic structure at and near surfaces
Applicant Aebi Philipp
Number 134890
Funding scheme Project funding
Research institution Département de Physique Université de Fribourg
Institution of higher education University of Fribourg - FR
Main discipline Condensed Matter Physics
Start/End 01.04.2011 - 31.03.2013
Approved amount 456'636.00
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Keywords (9)

surfaces; nanostructures; selfassembly; low dimensional systems; transition metal dichalcogenides; angle-resolved photoemission; Fermi surface mapping; scanning tunneling microscopy and spectroscopy; low energy electron diffraction

Lay Summary (English)

Lead
Lay summary

Context and significance:

Theproject focuses on fundamental physics concerning the atomic and electronicstructure. The main goal is to create new knowledge and better understanding atthe quantum mechanics and sub-nanometer level of how electrons and atoms areorganized in solids and near surfaces. In particular, the results lead to newviews and explanations on the mechanisms behind the extremely variableproperties of new and old materials used in various devices and applications.Research in this field is crucial for all developments in relation with newmaterials.            

 

 

Scientific frame and methodology:

Theframe and methodology is given by the experimental possibilities. In thepresent project angle-resolved photoemission and scanning tunneling microscopyand spectroscopy experiments are done. These experiments allow a very detailedinvestigation of the “organization” of electrons and atoms at the surface andclose to it. However, these experiments require well-defined surfaces of thematerials under study and stringent vacuum conditions.            

Direct link to Lay Summary Last update: 21.02.2013

Responsible applicant and co-applicants

Employees

Publications

Publication
Ab initio many-body effects in TiSe2: A possible excitonic insulator scenario from GW band-shape renormalization
Cazzaniga M., Cercellier H., Holzmann M., Monney C., Aebi P., Onida G., Olevano V., Ab initio many-body effects in TiSe2: A possible excitonic insulator scenario from GW band-shape renormalization, in PHYSICAL REVIEW B, 85(19), 195111.
Electron- hole fluctuation phase in 1T-TiSe2
Monney C., Monney G., Aebi P., Beck H., Electron- hole fluctuation phase in 1T-TiSe2, in PHYSICAL REVIEW B, 85(23), 235150.
Electron-hole instability in 1T-TiSe2
Monney C., Monney G., Aebi P., Beck H., Electron-hole instability in 1T-TiSe2, in NEW JOURNAL OF PHYSICS, 14, 075026.
Influence of elastic scattering on the measurement of core-level binding energy dispersion in X-ray photoemission spectroscopy
Schwier EF, Monney C, Mariotti N, Vydrova Z, Garcia-Fernandez M, Didiot C, Garnier MG, Aebi P, Influence of elastic scattering on the measurement of core-level binding energy dispersion in X-ray photoemission spectroscopy, in EUROPEAN PHYSICAL JOURNAL B, 81(4), 399-403.
Mapping of Electron-Hole Excitations in the Charge-Density-Wave System 1T-TiSe2 Using Resonant Inelastic X-Ray Scattering
Monney C., Zhou K. J., Cercellier H., Vydrova Z., Garnier M. G., Monney G., Strocov V. N., Berger H., Beck H., Schmitt T., Aebi P., Mapping of Electron-Hole Excitations in the Charge-Density-Wave System 1T-TiSe2 Using Resonant Inelastic X-Ray Scattering, in PHYSICAL REVIEW LETTERS, 109(4), 047401.
Reversible control of the electronic density of states at the Fermi level of Ca3Co4O9+delta misfit-layered oxide single crystals through O+/H+ plasma exposure
Moser D., Garnier M. G., Karvonen L., Shkabko A., Aebi P., Weidenkaff A., Reversible control of the electronic density of states at the Fermi level of Ca3Co4O9+delta misfit-layered oxide single crystals through O+/H+ plasma exposure, in JOURNAL OF MATERIALS SCIENCE, 48(7), 2823-2828.
Scanning tunneling microscopy at multiple voltage biases of stable "ring-like" Ag clusters on Si(111)-(7 x 7)
Mariotti N., Didiot C., Schwier E. F., Monney C., Perret-Aebi L. -E., Battaglia C., Garnier M. G., Aebi P., Scanning tunneling microscopy at multiple voltage biases of stable "ring-like" Ag clusters on Si(111)-(7 x 7), in SURFACE SCIENCE, 606(23-24), 1755-1759.
Unusual temperature dependence of the spectral weight near the Fermi level of NdNiO3 thin films
Schwier E. F., Scherwitzl R., Vydrova Z., Garcia-Fernandez M., Gibert M., Zubko P., Garnier M. G., Triscone J. -M., Aebi P., Unusual temperature dependence of the spectral weight near the Fermi level of NdNiO3 thin films, in PHYSICAL REVIEW B, 86(19), 195147.
Valence band electronic structure characterization of the rutile TiO2 (110)-(1 x 2) reconstructed surface
Sanchez-Sanchez C., Garnier M. G., Aebi P., Blanco-Rey M., de Andres P. L., Martin-Gago J. A., Lopez M. F., Valence band electronic structure characterization of the rutile TiO2 (110)-(1 x 2) reconstructed surface, in SURFACE SCIENCE, 608, 92-96.

Associated projects

Number Title Start Funding scheme
128686 Towards a more bulk sensitive photoemission experiment 01.06.2010 R'EQUIP
139102 High resolution X-ray diffractometer for the structural analysis of thin films, heterostructures and nanoparticles at variable temperatures 01.03.2012 R'EQUIP
121344 PEARL: A new bending-magnet endstation for state-of-the-art X-ray Photoelectron Diffraction combined with Scanning Tunneling Microscopy characterization at the Swiss Light Source 01.10.2009 R'EQUIP
124681 Geometrical and electronic structure at and near surfaces 01.04.2009 Project funding
124681 Geometrical and electronic structure at and near surfaces 01.04.2009 Project funding
147198 Geometrical and electronic structure at and near surfaces 01.04.2013 Project funding
147198 Geometrical and electronic structure at and near surfaces 01.04.2013 Project funding

Abstract

Context and significance:The project focuses on fundamental physics concerning the atomic and electronic structure. The main goal is to create new knowledge and better understanding on the quantum mechanics and sub-nanometer level of how electrons and atoms are organized in solids and near surfaces. In particular, the results lead to new views and explanations on the mechanisms behind the extremely variable properties of new and old materials used in various devices and applications. Research in this field is crucial for all developments in relation with new materials. Scientific frame and methodology:The frame and methodology is given by the experimental possibilities. In the present project angle-resolved photoemission and scanning tunneling microscopy and spectroscopy experiments are done. These experiments allow a very detailed investigation of the “organization” of electrons and atoms at the surface and close to it. However, these experiments require well-defined surfaces of the materials under study and stringent vacuum conditions.
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