Hermann Sellier
Hermann Sellier is a quantum-transport experimentalist at Institut Néel (CNRS/Université Grenoble Alpes). After ENS Lyon (1999) and a PhD (2002) on mesoscopic superconductivity—highlighting ferromagnetic Josephson π-junctions—he pioneered single-dopant transport spectroscopy in silicon nanowires at Delft, resolving individual donor states. Back in Grenoble since 2005, his group develops scanning-gate microscopy to image and control coherent electron flow, and co-demonstrated a gate-tunable Fabry–Pérot quantum Hall interferometer in graphene. More recently, he works on electron flying qubits using voltage pulses and surface acoustic waves, enabling phase-coherent single-electron manipulation and antibunching. His expertise spans low-temperature transport, local probe techniques, and quantum electron-optics in semiconductor and graphene devices.
Hermann Sellier is a condensed-matter physicist specializing in quantum transport in semiconductor and graphene devices, using low-temperature electronic transport and scanning-gate microscopy (SGM). He graduated from the École Normale Supérieure de Lyon in 1999 and completed a PhD in 2002 on mesoscopic superconductivity, where he probed ferromagnetic Josephson junctions at the 0–π crossover and revealed half-integer Shapiro steps consistent with a dominant sin2ϕ current-phase relation.
As a postdoctoral researcher at the Kavli Institute of Nanoscience (TU Delft), Sellier demonstrated transport spectroscopy of a single dopant in a gated silicon nanowire—resolving discrete donor states and their spin filling—establishing silicon single-atom devices as a platform for quantum electronics.
Since 2005, as faculty at Université Grenoble Alpes and researcher at Institut Néel, he has advanced SGM as a phase-sensitive probe, including the Kondo phase shift at the zero-bias anomaly of quantum point contacts, and extended SGM to ballistic graphene p–n junctions to visualize electron-optics trajectories.
In graphene electron optics, Sellier co-developed a tunable Fabry–Pérot quantum Hall interferometer with high-visibility Aharonov–Bohm oscillations and coherence lengths approaching 10 µm at 20 mK—providing a robust phase-coherent architecture for integer and future fractional regimes.
Since 2021 he has also worked on electron flying qubits, implementing surface-acoustic-wave and ultrafast-pulse control of single-electron wave packets. Recent milestones include Coulomb-mediated antibunching of SAW-shuttled electrons and ultrashort-pulse electronic interferometry, charting routes to two-particle gates for solid-state electron quantum optics.
Across these efforts, Sellier’s laboratory integrates precision nanofabrication, cryogenic transport, local-probe control, and phase-coherent interferometry to reveal—and ultimately engineer—the mesoscopic physics of carriers in low-dimensional systems.