Quantum Metrology (METQ)
Coordinator : Christophe CHAUBET
| Teaching Researchers (UM): CHAUBET Christophe CHENAUD Boris Emeritus : RAYMOND André |
Our research focuses on quantum electronics at the nanoscale. We are working on several topics related to the behavior of charge carriers in two-dimensional electron gases found in semiconductors quantum wells.
To accurately understand quantum effects in nanotransistors, it is necessary to perform highly accurate electrical measurements using low-noise metrology techniques.
To this end, our research group works with the L2C’s Metrology and Nanoelectronics platform, which has sufficient sensitivity to extract the quantum signature of these phenomena. We have used it, for example, in spin Hall effect measurements and to qualify magnetic field nanosensors.
We are currently working on quantum inductors in Hall effect mode (under strong magnetic fields and at very low temperatures), which are induced by the coupling between chiral 1D plasmons present at the edges of the sample. This topic is related to the metrological ac representation of Ohm. We are also studying the transition from classical to quantum in this inductive response.
We are developing a more applied activity as well on lateral gate transistors, the feasibility of which we have demonstrated on GaAs quantum wells and for which we have filed a patent. This top-gate-free technology makes the transistor much more robust in all respects. We are currently continuing studies on the same transistor technology but using GaN, in collaboration with the CHREA in Valbonne.