Morpurgo's Quantum Electronic Group

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OUR JOB:

In the Quantum Electronics groups we study microscopic electronic processes in different classes of materials, by investigating the transport properties of devices developed using state-of-the art nano-fabrication techniques (electron-beam and photo-lithography, e-beam evaporation, sputter deposition). Our interests span a broad range of material systems, including graphene and carbon-nanotubes, molecular semiconductors, hybrid normal/superconductor circuits, and topological insulators. More novel materials are considered. We usually follow an approach typical of mesoscopic physics, where attention is devoted to the realization of devices that are particularly suited for the study of the specific processes of interest.

The two main areas of research at this time are graphene-based electronics and single-crystal organic devices.

See interview of Prof. A. Morpurgo on National Swiss French Television:

See also: www.nouvo.ch www.tsr.ch Euronews, 21.10.2010

Nano-fabrication:

We fabricate nano-devices to access relevant physics. The relevant length scale on which a system exhibits mesoscopic behavior depends on the phenomenon of interest.

Our laboratory is fully self-sufficient for the device fabrication, and it is equipped with electron-beam lithography and material deposition facilities, inspection equipments (SEM, AFM, STM),and low-noise cryogenic measurements (dilution refrigerator, He3 system, variable-temperature inserts from 300 K to 1.5K, magnetic field up to 21 T).

Depending on the system studied, the material needed for the device realization is other grown in house or obtained through collaborations.

Organic Transistors:

Our research allows to combine studies that are relevant for the fundamental understanding of physics and of interest for possible future device applications. The development of top quality of organic transitors is an example of research with clear relevance for applications.

- Look at some of our recent papers on organic single-crystal devices: Publications

Graphene:

Examples of fundamental physics issues that we are investigating:
Properties of Dirac electrons in graphene and topological insulators, Andreev reflection and supercurrent in different types of superconducting junctions, quantum interference of electron waves, and spin transport.

- Look at some of our recent papers on graphene: Publications