Local spectroscopy of quantum devices

We use special scanning probe microscopes at low and very low temperatures to probe spatially the quantum phenomena at play in nanoscale devices, in particular semiconductor and superconducting devices.

- For semiconductor devices based on high-mobility two-dimensional electron gases (2DEG), we use scanning gate microscopy (SGM) to reveal and tune their properties with a high spatial resolution. In this technique, the tip acts as a narrow movable gate that changes the device conductance and provides real space images of the quantum phenomena in nanoscale devices such as dots, rings, and point contacts. This is a joint research axes carried out together with Serge Huant (NOF team).

- For scanning tunneling spectroscopy of conducting devices fabricated on insulting substrates, we use a combined AFM-STM microscope which allows us to record the topography of the device by atomic force microscopy before doing spatially resolved density of state spectroscopy of the conducting regions. In particular, we investigate the superconductivity induced by proximity effect in the normal metal of S/N/S junctions at very low temperature.

Quantum Electronic Circuits Alps - QuantECA

Quantum Electronic Circuits Alps - QuantECA

Quantum phenomena in electronic circuits : from model systems to large scale integration.
Helium : from fundamental to applications - HELFA

Helium : from fundamental to applications - HELFA

Helium as model system, hydrodynamic and turbulence, space and astrophysics, instrumentation and cryogenic development, kinetic inductance detectors.
Magnetism and Superconductivity - MagSup

Magnetism and Superconductivity - MagSup

Team Magnetism and Superconductivity at Institut NEEL - Systems involving charge, spin or lattice degrees of freedom.
Optics and materials - OPTIMA

Optics and materials - OPTIMA

a complete chain of competences that goes from the design and elaboration of new materials to the study of nonlinear optical properties and plasmonics
Materials, Radiations, Structure - MRS

Materials, Radiations, Structure - MRS

Understanding of the physico-chemical properties of complex materials based on the precise description of their structure
Micro and NanoMagnetism - MNM

Micro and NanoMagnetism - MNM

Complementary expertise in fabrication, characterisation, and simulations for studies in nanomagnetism with applications in spin electronics and micro-systems
Quantum Nano-Electronics and Spectroscopy - QuNES

Quantum Nano-Electronics and Spectroscopy - QuNES

Electron transport and local spectroscopy of quantum structures
Nano-Optics and Forces - NOF

Nano-Optics and Forces - NOF

Nano - optics and forces
Nanophysics and Semiconductors - NPSC

Nanophysics and Semiconductors - NPSC

Growth of III-V and II-VI semiconductor nanostructures and their physics in search of new functions for potential applications.
Wide bandgap semiconductors - SC2G

Wide bandgap semiconductors - SC2G

Physics of diamond and other wide bandgap semiconductors towards applications in electronics and biotechnologies
Surfaces, Interfaces and Nanostructures - SIN

Surfaces, Interfaces and Nanostructures - SIN

Experimental and theoretical studies of low dimensional systems
Hybrid systems at low dimensions - HYBRID

Hybrid systems at low dimensions - HYBRID

Electronic, optical, vibrational, mechanical properties, as well as their interplay at the nanoscale, of novel hybrid systems (nanotubes, graphene, two-dimensional and functionalized materials) which are developed by the group .
Condensed Matter Theory - TMC

Condensed Matter Theory - TMC

Theoretical research related to quantum materials and first-principles theory. >> read more
Thermodynamics and Biophysics of small systems - TPS

Thermodynamics and Biophysics of small systems - TPS

Ultra-sensitive instrumentation for electrical and thermal measurements: from biophysics to low temperature condensed matter physics.
Theory of Quantum Circuits - ThQC

Theory of Quantum Circuits - ThQC

Theoretical studies of electronic transport in nanometer-scale devices showing remarkable quantum effects.
Ultra-low temperatures - UBT

Ultra-low temperatures - UBT

Quantum physics at the ultra-low temperature frontier.

Kondo cloud extension around quantum dots



Scanning gate investigation of the Kondo screening cloud

Electron-electron interactions in quantum point contacts



Scanning gate investigation of the conductance anomalies

Superconducting junctions probed by scanning tunneling spectroscopy



Local density of states in a hybrid Josephson junctions

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