388 citations · 1.8k across the 41 of their papers we have counts for
10 papers · 1 filter
Resonant single-parameter pumping in graphene
Y. Korniyenko, O. Shevtsov, T. Lofwander
We present results for non-adiabatic single-parameter pumping in a ballistic graphene field-effect transistor. We investigate how scattering from an ac-driven top gate results in d…
Shot noise in a harmonically driven ballistic graphene transistor
Yevgeniy Korniyenko, Oleksii Shevtsov, Tomas Lofwander
We study time-dependent electron transport and quantum noise in a ballistic graphene field effect transistor driven by an ac gate potential. The non-linear response to the ac signa…
Nonlinear response of a ballistic graphene transistor with an ac-driven gate: high harmonic generation and THz detection
Yevgeniy Korniyenko, Oleksii Shevtsov, Tomas Lofwander
We present results for time-dependent electron transport in a ballistic graphene field-effect transistor with an ac-driven gate. Nonlinear response to the ac drive is derived utili…
Spectral properties of superconductors with ferromagnetically ordered magnetic impurities
Daniel Persson, Oleksii Shevtsov, Tomas Löfwander +1
We present a comprehensive theoretical study of thermodynamic properties of superconductors with a dilute concentration of magnetic impurities, with focus on how the properties of…
Resonant high harmonic generation in a ballistic graphene transistor with an AC driven gate
Y. Korniyenko, O. Shevtsov, T. Lofwander
We report a theoretical study of time-dependent transport in a ballistic graphene field effect transistor. We develop a model based on Floquet theory describing Dirac electron tran…
Conductance footprints of impurity scattering in graphene nanoribbons
Anders Bergvall, Tomas Lofwander
We report a detailed analytic investigation of the interplay between size quantization and local scattering centers in armchair graphene nanoribbons, as seen in the conductance. Th…
Spin imbalance in hybrid superconducting structures with spin-active interfaces
Oleksii Shevtsov, Tomas Löfwander
We consider a heterostructure consisting of a normal metal and a superconductor separated by a spin-active interface. At finite-bias voltages, spin-filtering and spin-mixing effect…
Spectral footprints of impurity scattering in graphene nanoribbons
Anders Bergvall, Tomas Lofwander
We report a detailed investigation of the interplay between size quantization and local scattering centers in graphene nanoribbons, as seen in the local density of states. The spec…
Quantum Hall effect in graphene with twisted bilayer stripe defects
Tomas Lofwander, Pablo San-Jose, Elsa Prada
We analyze the quantum Hall effect in single layer graphene with bilayer stripe defects. Such defects are often encountered at steps in the substrate of graphene grown on silicon c…
Graphene Nanogap for Gate Tunable Quantum Coherent Single Molecule Electronics
A. Bergvall, K. Berland, P. Hyldgaard +2
We present atomistic calculations of quantum coherent electron transport through fulleropyrrolidine terminated molecules bridging a graphene nanogap. We predict that three difficul…