Publications

Chemically enriched graphene-based switching devices: A novel principle driven by impurity-induced quasibound states and quantum coherence
S. Roche, B. Biel, A. Cresti, F. Triozon
Physica E: Low-dimensional Systems and Nanostructures, 44, 960-962 (2012)

Quenching of the Quantum Hall Effect in Graphene with Scrolled Edges
Alessandro Cresti, Michael M. Fogler, Francisco Guinea, A. H. Castro Neto, and Stephan Roche
Physical Review Letters, 108, 166602 (2012)

Exploring spin-orbit coupling effects in models of topological insulators
S. Roche
Topological insulators and non-perturbative spin-orbit coupling, CECAM-HQ-EPFL, January 9-11, Lausanne, Switzerland
Invited Talk (2012)

Transport properties in disordered graphene : effects of atomic hydrogen and structural defects
S. Roche
Towards Reality in Nanoscale Materials V (TRNM V), February 20-22, Levi, Finland
Invited Talk (2012)

Graphene gets a better gap
Stephan Roche
Nature Nanotechnology, 6, 8 (2011)

Magnetoresistance and Magnetic Ordering Fingerprints in Hydrogenated Graphene
D. Soriano, N. Leconte, P. Ordejón, J.-Ch. Charlier, J.-J. Palacios and S. Roche
Physical Review Letters, 107, 16602(4) (2011)

Unveiling the Magnetic Structure of Graphene Nanoribbons
R. Ribeiro, J.-M. Poumirol, A. Cresti, W. Escoffier, M. Goiran, J.-M. Broto, S. Roche and B. Raquet.
Physical Review Letters, 107, 086601 (2011)

Two-dimensional Graphene with Structural Defects: Elastic Mean Free Path, Minimum Conductivity and Anderson
A. Lherbier, S.M.M. Dubois, X. Declerck, S. Roche, Y.-M. Niquet and J.C. Charlier
Physical Review Letters, 106, 046803 (2011)

Integer quantum hall effect in trilayer graphene
A. Kumar, W. Escoffier, J. M. Poumirol, C. Faugeras, D. P. Arovas, M. M. Fogler, F. Guinea, S. Roche, M. Goiran and B. Raquet
Physical Review Letters, 107, 126806 (2011)

Inelastic Transport in Vibrating Disordered Carbon Nanotubes: Scattering Times and Temperature Dependent Decoherence Effects
H. Ishii, S. Roche, N. Kobayashi, H. Hirose,
Physical Review Letters, 104, 116801 (2010)

Tuning laser-induced bandgaps in graphene
H. L.Calvo, H. M. Pastawski, Sr. Roche and L. E. F. Foa Torres
Applied Physics Letters, 98, 232103 (2011)

Magnetoresistance in disordered graphene: The role of pseudospin and dimensionality effects unraveled
F. Ortmann, A. Cresti, G. Montambaux and Sr. Roche
European Physics Letters, 94, 47006 (2011)

Magnetism-Dependent Transport Phenomena in Hydrogenated Graphene: From Spin-Splitting to Localisation Effects
N. Leconte, D. Soriano, S. Roche, P. Ordejon, J.-Ch.Charlier and J. J. Palacios
ACS Nano, 5, 3987 (2011)

Oxygen surface functionalisation of graphene nanoribbons for transport gap engineering
A. Cresti, A. López-Bezanilla, P. Ordejón and S. Roche
ACS Nano, 5 (11), 9271–9277 (2011)

Electron-hole transport asymmetry and conduction gaps in edge-defected graphene nanoribbons
S. Dubois, J.C. Charlier, A. Lopez-Bezanilla, A. Cresti, F. Triozon, B. Biel and S. Roche
ACS Nano, 4, 1971-1976 (2010)

Ozone Treatment of Graphene : A Route towards the Control of Metal-insulator Transition
N. Leconte, J. Moser, P. Ordejon, H. Tao, F. Alsina, A. Lherbier, C. M. Sotomayor Torres, J.C._x000D_ Charlier, A. Bachtold, S. Roche
ACS Nano, 4, 4033 (2010)

Graphene: Piecing it Together
Mark H. Rümmeli, Claudia G. Rocha, Frank Ortmann, Imad Ibrahim, Haldun Sevincli, Felix Börrnert, Jens Kunstmann, Alicja Bachmatiuk, Markus Pötschke, Masashi Shiraishi, M. Meyyappan, Bernd Büchner, Stephan Roche and Gianaurelio Cuniberti
Advanced Materials, 23, 4471–4490 (2011)

Engineering carbon chains from mechanically streched graphene-based materials
E. Erdogan, I. Popov, C. G. Rocha, G. Cuniberti, S. Roche and G. Seifert
Physical Review B, 83, 041401 (Rapid Communication) (2011)

Mechanically-induced transport switching effect in graphene-based nanojunctions
T. Kawai, M. Poetschke, Y. Miyamoto, C.G.Rocha, S. Roche and G. Cuniberti
Physical Review B, 83, 241405(4) (2011)

Tuning the Bandgap of Semiconducting Carbon Nanotube by an Axial Magnetic Field
G. Fedorov, D. Smirnov, P. Barbara, D. Jimenez, S. Roche
Applied Physics Letters, 96, 132101 (2010)

Edge Magneto-Fingerprints in Disordered Graphene Nanoribbons
J.-M. Poumirol, A. Cresti, S. Roche, W. Escoffier, M. Goiran, X. Wang, X. Li, H. Dai, B. Raquet
Physical Review B, 82, 041413 (2010)

Magneto-transport in disordered graphene: from weak to strong localization
J. Moser, H. Tao, S. Roche, F. Alsina, C.M. Sotomayor and A. Bachtold
Physical Review B, 81, 205445 (2010)

Quantum Transport Properties of Chemically Functionalized Long Semiconducting Carbon Nanotubes
A. López-Bezanilla, X. Blase, S. Roche
Nano Research, 3, 288-295 (2010)

Simulation, modelling and characterisation of quasi-ballistic transport in nanometer sized field effect transistors: from TCAD to atomistic simulation
S. Roche, Th. Poiroux, G. Lecarval, S. Barraud, F. Triozon, M. Persson and Y.M. Niquet
International Journal of Nanotechnology, 7, 348 (2010)

Enginneering carbon chains from mechanically stretched grapheme-based materials
E. Erdogan, I. Popov, C. G. Rocha, G. Cuniberti, S. Roche and G. Seifert
Physical Review B, 83, 041401 (2010)

Modeling graphene based nanoelectromechanical devices
M. Poetschke, C. G. Rocha, L. E. F. Foa Torres, S. Roche, and G. Cuniberti
Physical Review B, 81, 193404 (2010)

Phonon transport in large scale carbon-based disordered materials: Implementation of an efficient order-N and real-space Kubo methodology
W. Li, H.Sevincli, G. Cuniberti and S. Roche,
Physical Review B, 82, 041410 (2010)

Mobility gaps in disordered graphene-based materials: an ab initio-based tight-binding approach to mesoscopic transport
B. Biel, A. Cresti, R. Avriller, S. Duboi, A. Lopez-Bezanilla, F. Triozon, X. Blase, J.-C. Charlier, and S._x000D_ Roche
Physica Status Solidi C-Basic Solid State Physics, 7, 1112 (2010)

Conductance of functionalized nanotubes, graphene and nanowires: from ab initio to mesoscopic physics
X. Blase, C. Adessi, B. Biel, A. Lopez-Bezanilla, M.-V. Fernandez-Serra, E. R. Margine, F. Triozon,_x000D_ and S. Roche
Physica Status Solidi B-Basic Solid State Physics, 247, 1112 (2010)

Simulation du transport quantique
F. Triozon and S. Roche,
Techniques pour l’Ingénieur, Editions T.I, 400-1 (2010)

Magnetotransport in disordered graphene exposed to ozone: from weak to strong localization.
J. Moser, H. Tao, S. Roche, F. Alzina, C. M. Sotomayor Torres, and A. Bachtold.
Physical Review B, 81 (20), 205445 (2010)

Damaging graphene with ozone treatment: a chemically tunable metal insulator transition
N. Leconte, J. Moser, P. Ordejón, H.H. Tao, A. Lherbier, A. Bachtold, F. Alzina, C. M. Sotomayor, J.C. Charlier, S. Roche
ACS Nano, 4, 4033-4038 (2010)

Quantum transport in chemically modified two-dimensional graphene: From minimal conductivity to Anderson localization
N. Leconte, A. Lherbier, F. Varchon, P. Ordejon, S. Roche and J.-C. Charlier
Physical Review B, 84 (23), 235420 (2011)

Efficient linear scaling method for computing the thermal conductivity of disordered materials
Wu Li, H. Sevincli, S. Roche and G. Cuniberti
Physical Review B, 83, 155416 (2011)

Chemically enriched graphene-based switching devices: a novel principle dirven by impurity-induced quasibound states and quantum coherence
S. Roche, B. Biel, A. Cresti and F. Triozon
Physica E: Low-dimensional Systems and Nanostructures, DOI:10.1016/j.physe.2011.06.008 (2011)

Inducing and optimizing magnetism in graphene nanomeshes
Hong-Xin Yang, M. Chshiev, D. W. Boukhvalov and S. Roche
Physical Review B, 84, 214404 (2011)

Effects of domains in phonon conduction through hybrid boron nitride and graphene sheets
H. Sevinçli, W. Li, N. Mingo, G. Cuniberti and S. Roche
Physical Review B, 84, 205444 (2011)

Polaron transport in organic crystals: Temperature tuning of disorder effects
F. Ortmann and S. Roche
Physical Review B, 84, 180302(R) (2011)