102 citations · 342 across the 15 of their papers we have counts for
14 papers · 1 filter
Reconstructing the potential configuration in a high-mobility semiconductor heterostructure with scanning gate microscopy
Gaëtan J. Percebois, Antonio Lacerda-Santos, Boris Brun +3
The weak disorder potential seen by the electrons of a two-dimensional electron gas in high-mobility semiconductor heterostructures leads to fluctuations in the physical properties…
A single hole spin with enhanced coherence in natural silicon
N. Piot, B. Brun, V. Schmitt +14
Semiconductor spin qubits based on spin-orbit states are responsive to electric field excitation allowing for practical, fast and potentially scalable qubit control. Spin-electric…
Graphene whisperitronics: transducing whispering gallery modes into electronic transport
Boris Brun, Viet-Hung Nguyen, Nicolas Moreau +6
When confined in circular cavities, graphene relativistic charge carriers occupy whispering gallery modes (WGM) in analogy to classical acoustic and optical fields. The rich geomet…
Quantum Hall nano-interferometer in graphene
N. Moreau, B. Brun, S. Somanchi +4
Quantum Hall edge states offer avenues for quasiparticle interferometry, provided that the ratio between phase coherence length and quantum Hall interferometer (QHI) size is large…
Contacts and upstream modes explain the electron-hole asymmetry in the graphene quantum Hall regime
Nicolas Moreau, Boris Brun, Sowmya Somanchi +4
Observations of electron-hole asymmetry in transport through graphene devices at high magnetic field challenge prevalent models of the graphene quantum Hall effect. Here, we study…
Upstream modes and antidots poison graphene quantum Hall effect
Nicolas Moreau, Boris Brun, Sowmya Somanchi +4
The quantum Hall effect is the seminal example of topological protection, as charge carriers are transmitted through one-dimensional edge channels where backscattering is prohibite…
Accurate characterization of tip-induced potential using electron interferometry
A. Iordanescu, S. Toussaint, G. Bachelier +5
Using the tip of a scanning probe microscope as a local electrostatic gate gives access to real space information on electrostatics as well as charge transport at the nanoscale, pr…
Optimizing Dirac fermions quasi-confinement by potential smoothness engineering
Boris Brun, Nicolas Moreau, Sowmya Somanchi +7
With the advent of high mobility encapsulated graphene devices, new electronic components ruled by Dirac fermions optics have been envisioned and realized. The main building blocks…
Imaging Dirac fermions flow through a circular Veselago lens
Boris Brun, Nicolas Moreau, Sowmya Somanchi +6
Graphene charge carriers behave as relativistic massless fermions, thereby exhibiting a variety of counter-intuitive behaviors. In particular, at p-n junctions, they behave as phot…
2D Rutherford-Like Scattering in Ballistic Nanodevices
S. Toussaint, B. Brun-Barrière, S. Faniel +4
Ballistic injection in a nanodevice is a complex process where electrons can either be transmitted or reflected, thereby introducing deviations from the otherwise quantized conduct…
Thermoelectric Scanning Gate Interferometry on a Quantum Point Contact
B. Brun, F. Martins, S. Faniel +11
We introduce a new scanning probe technique derived from scanning gate microscopy (SGM) in order to investigate thermoelectric transport in two-dimensional semiconductor devices. T…
Electron phase shift at the zero-bias anomaly of quantum point contacts
B. Brun, F. Martins, S. Faniel +11
The Kondo effect is the many-body screening of a local spin by a cloud of electrons at very low temperature. It has been proposed as an explanation of the zero-bias anomaly in quan…
Interference features in scanning gate conductance maps of quantum point contacts with disorder
K. Kolasiński, B. Szafran, B. Brun +1
We consider quantum point contacts (QPCs) defined within disordered two-dimensional electron gases as studied by scanning gate microscopy. We evaluate the conductance maps in the L…
Wigner and Kondo physics in quantum point contacts revealed by scanning gate microscopy
B. Brun, F. Martins, S. Faniel +11
Quantum point contacts exhibit mysterious conductance anomalies in addition to well known conductance plateaus at multiples of 2e^2/h. These 0.7 and zero-bias anomalies have been i…