Stefan Heun

  • CNR Researcher
  • stefan.heun@nano.cnr.it
  • Pisa
  • +39-050-509-472
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Short Bio

Stefan Heun is Research Director at the Istituto Nanoscienze of the Italian National Research Council CNR. He received his diploma in physics at the University of Hannover (Germany), where he investigated, in the group of Prof. M. Henzler, the initial stages of epitaxial growth of silicon on Si(100). In 1993 he received his Ph.D. in the same group, working on the magnetoconductivity of monolayer-thin films of Ag, Pb, and Au deposited on Si(111).

In 1993 he joined the Interdisciplinary Research Laboratories of the Japanese Telecom NTT in Tokyo (Japan), where he studied the surface passivation of III-V semiconductors using synchrotron radiation.

In 1995 he moved as a Marie Curie Fellow to the Materials Division of the TASC (now IOM) lab in Trieste (Italy), where he worked on the engineering of heterostructure interfaces.

In 1997 he became a beam line scientist at the Sincrotrone Trieste, where he was appointed responsible of the Nanospectroscopy Beamline, at which he also performed his research on low-dimensional systems.

Finally, in 2004 he joined the CNR as a senior scientist, first in Trieste and since October 2006 at Istituto Nanoscienze in Pisa (Italy). In these last years his work focuses on the use of scanning probe microscopy, in particular scanning gate microscopy (SGM) and scanning tunneling microscopy (STM), for the study of semiconductor and graphene nanostructures.

Stefan Heun has co-authored more than 160 papers and has given more than 110 invited presentations and seminars. To date (May 2021) his papers have been cited over 3400 times. h-index: 31. He is Contract Professor at Scuola Normale Superiore in Pisa and at University of Pisa where he teaches on Nanostructured Materials.

Research Interests

My main research interest is the physics of low-dimensional systems. Using a combination of scanning probe microscopies and low-temperature magneto-transport, we investigate quantum effects (quantum Hall effect, weak localization, anisotropic magneto-transport, Josephson junctions) and surface phenomena relevant for applications (hydrogen storage, defect characterization, surface functionalization, metal intercalation) in III-V 2DEGs, graphene, and exfoliated few-layer black phosphorus.

Selected Recent Projects

Selected Publications

M. Carrega, L. Chirolli, S. Heun, and L. Sorba, Anyons in quantum Hall interferometryn, Nat. Rev. Phys. 3 (2021) 698 – 711.

A. Kumar, F. Telesio, D. Prezzi, C. Cardoso, A. Catellani, S. Forti, C. Coletti, M. Sarrano-Ruiz, M. Peruzzini, F. Beltram, and S. Heun, Black phosphorus n-type doping by Cu: a microscopic surface investigation, J. Phys. Chem. C 125 (2021) 13477 – 13484.

I. Verma, S. Salimian, V. Zannier, S. Heun, F. Rossi, D. Ercolani, F. Beltram, and L. Sorba: High-mobility free-standing InSb nanoflags grown on InP nanowire stems for quantum devices, ACS Appl. Nano Mater. 4 (2021) 5825 – 5833.

S. Momtaz, S. Heun, G. Biasiol, and S. Roddaro: Cascaded Quantum Hall Bisection and Applications to Quantum Metrology, Phys. Rev. Appl. 14 (2020) 024059.

F. Telesio, G. Le Gal, M. Serrano-Ruiz, F. Prescimone, S. Toffanin, M. Peruzzini, and S. Heun: Ohmic contact engineering in few-layer black phosphorus: approaching the quantum limit, Nanotechnology 31 (2020) 334002.

S. Salimian, S. Xiang, S. Colonna, F. Ronci, M. Fosca, F. Rossella, F. Beltram, R. Flammini, and S. Heun, Morphology and Magneto-Transport in Exfoliated Graphene on Ultrathin Crystalline β-Si3N4(0001)/Si(111), Adv. Mater. Interfaces 7 (2020) 1902175.

S. Veronesi, T. Papa, Y. Murata, and S. Heun, An atomically flat single-crystalline gold film thermometer on mica to study energy (heat) exchange at the nano-scale, Appl. Surf. Sci. 512 (2020) 145658.

S. Guiducci, M. Carrega, F. Taddei, G. Biasiol, H. Courtois, F. Beltram, and S. Heun, Full electrostatic control of quantum interference in an extended trenched Josephson junction, Phys. Rev. B 99, 235419 (2019).

Y. Murata, S. Veronesi, D. Whang, and S. Heun, Morphology of Ti on monolayer nanocrystalline graphene and its unexpectedly low hydrogen adsorption, J. Phys. Chem. C 123 (2019) 1572.

S. Guiducci, M. Carrega, G. Biasiol, L. Sorba, F. Beltram, and S. Heun, Toward quantum Hall effect in a Josephson junction, Phys. Status Solidi RRL 13 (2019) 1800222.

 

Istituto Nanoscienze 

Consiglio Nazionale delle Ricerche

 

PEC: protocollo.nano@pec.cnr.it

Partita IVA 02118311006

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Pisa NEST

Piazza San Silvestro 12

56127 Pisa, Italy

phone +39 050 509418

fax +39 050 509550

segreteria.nest@nano.cnr.it

Modena S3
via Campi 213/A
41125 Modena, Italy
phone +39 059 2055629
fax +39 059 2055651
segreteria.s3@nano.cnr.it

Istituto Nanoscienze Consiglio Nazionale delle Ricerche

Facebook-f Instagram Twitter Linkedin
Pisa NEST

Piazza San Silvestro 12, I
56127 Pisa

phone +39 050 509525/418

fax +39 050 509550

Modena S3

via Campi 213/A, I 

41125 Modena 7

phone +39 059 2055629

fax +39 059 2055651″