Publications related to Investigation of Two-Dimensional Electron Gases with Angular Resolved Photoemission Spectroscopy

Crystalline and correlated phases in two-dimensional transition metal dichalcogenides

This thesis is dedicated to the study of various aspects of the electronic structure of two-dimensional transition metal dichalcogenides (TMDs) of chemical composition MX

_2

(where M is a transition metal atom and X= S, Se, Te), using a combination of \te ...

EPFL2019

Enhanced Electron-Phonon Interaction in Multivalley Materials

Nicola Marzari, Marco Gibertini, Helmuth Berger, Thibault Daniel Pierre Sohier, Evgeniy Ponomarev

We report a combined experimental and theoretical investigation that reveals a new mechanism responsible for the enhancement of electron-phonon coupling in doped semiconductors in which multiple inequivalent valleys are simultaneously populated. Using Rama ...

AMER PHYSICAL SOC2019

Electric field exfoliation and high-T-C superconductivity in field-effect hole-doped hydrogenated diamond (111)

Thibault Daniel Pierre Sohier

We investigate the possible occurrence of field-effect induced superconductivity in the hydrogenated (111) diamond surface by first-principles calculations. By computing the band alignment between bulk diamond and the hydrogenated surface, we show that the ...

2019

Characterizing the maximum number of layers in chemically exfoliated graphene

László Forró, Bálint Náfrádi, Péter Szirmai, Ferenc Simon, Julian Ayrton Englert, Bence Gábor Márkus

An efficient route to synthesize macroscopic amounts of graphene is highly desired and bulk characterization of such samples, in terms of the number of layers, is equally important. We present a Raman spectroscopy-based method to determine the typical uppe ...

Springer2019

Hydrogen sieving from intrinsic defects of benzene-derived single-layer graphene

Kumar Varoon Agrawal, Mostapha Dakhchoune, Shiqi Huang, Jing Zhao, Mina Moradi, Majharul Haque Khan

Single-layer graphene films, crystallized by chemical vapor deposition, host a low density of vacancy defects that are attractive for the size-sieving of molecules. The size and the density of such defects are a function of the growth temperature and the c ...

2019

Nontrivial evolution of the Sb(111) electronic and atomic structure after ion irradiation

Defects in crystal structure of layered material can modify the surface states. Ion bombardment is a simple way to introduce defects into a crystal lattice in the surface region. Comprehensive scanning tunneling microscopy (STM), low-energy electron diffra ...

ELSEVIER SCIENCE BV2019

Development of graphene-based ionizing radiation sensors

Alberto Ciarrocchi, Giovanni Borghi

We present the first steps to develop radiation sensors based on the graphene field effect transistor technology. Such a sensor exploits the ambipolar behavior of graphene near its Dirac point and it is not dependent on collecting charges, but it senses io ...

ELSEVIER SCIENCE BV2019

Crystallization of gas-selective nanoporous graphene by competitive etching and growth: a modeling study

Kumar Varoon Agrawal, Soumajit Dutta

A robust synthesis methodology for crystallizing nanoporous single-layer graphene hosting a high density of size-selective nanopores is urgently needed to realize the true potential of two-dimensional membranes for gas separation. Currently, there are no c ...

2019

Hydrogen storage material

Andreas Züttel, Heena Yang

The present relates to a carbon material having a 3D structure and made of graphene oxide and carbon nanotubes, characterized in that the 3D structure consists in that the carbon nanotubes are located with some agglomeration between the graphene oxide laye ...

2019

Local photo-mechanical stiffness revealed in gold nanoparticles supracrystals by ultrafast small-angle electron diffraction

Francesco Stellacci, Fabrizio Carbone, Giulia Fulvia Mancini, Tatiana Latychevskaia, Javier Reguera Gomez, Francesco Pennacchio

We demonstrate that highly ordered two-dimensional crystals of ligand-capped gold nanoparticles display a local photo-mechanical stiffness as high as that of solids such as graphite. In out-of-equilibrium electron diffraction experiments, a strong temperat ...

AMER INST PHYSICS2019

Investigation of Two-Dimensional Electron Gases with Angular Resolved Photoemission Spectroscopy

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Crystalline and correlated phases in two-dimensional transition metal dichalcogenides

Enhanced Electron-Phonon Interaction in Multivalley Materials

Electric field exfoliation and high-T-C superconductivity in field-effect hole-doped hydrogenated diamond (111)

Characterizing the maximum number of layers in chemically exfoliated graphene

Hydrogen sieving from intrinsic defects of benzene-derived single-layer graphene

Nontrivial evolution of the Sb(111) electronic and atomic structure after ion irradiation

Development of graphene-based ionizing radiation sensors

Crystallization of gas-selective nanoporous graphene by competitive etching and growth: a modeling study

Hydrogen storage material

Local photo-mechanical stiffness revealed in gold nanoparticles supracrystals by ultrafast small-angle electron diffraction

Hydrogen sieving from intrinsic defects of benzene-derived single-layer graphene

Crystalline and correlated phases in two-dimensional transition metal dichalcogenides

Enhanced Electron-Phonon Interaction in Multivalley Materials

Electric field exfoliation and high-T-C superconductivity in field-effect hole-doped hydrogenated diamond (111)

Development of graphene-based ionizing radiation sensors

Characterizing the maximum number of layers in chemically exfoliated graphene

Local photo-mechanical stiffness revealed in gold nanoparticles supracrystals by ultrafast small-angle electron diffraction

Nontrivial evolution of the Sb(111) electronic and atomic structure after ion irradiation

Crystallization of gas-selective nanoporous graphene by competitive etching and growth: a modeling study

Hydrogen storage material