Bart van Wees
Bart Jan van Wees (born August 4, 1961 in Nootdorp ) is a Dutch physicist who specializes in nanoscience , applied physics and solid state physics. He is a professor at the University of Groningen .
Van Wees studied applied physics (technical natural history) at the TU Delft from 1985 and received his doctorate there in 1989 with JE Mooij (Quantum ballistic and adiabatic transport, studied with quantum point contacts). From 1991 he was at the University of Groningen and in 1994 he was a visiting scientist at the NTT research laboratory in Atsugi . In 2000 he became professor for technical physics in Groningen with a focus on nanoscience. From 2003 he was project manager of the Zernike Nano Lab in Groningen and from 2008 to 2010 headed the organic electronics department at the Zernike Institute for Advanced Materials and from 2010 the project nanostructured materials with electromagnetic functionality.
From the late 1980s a pioneer in nanoelectronics and mesoscopic physics. In 1988 , with Carlo Beenakker and Henk van Houten , he found quantum point contacts in which the conductivity is quantized. Van der Wees also discovered the then inexplicable phenomenon of zero bias anomaly (ZBA) in very thin wires (nanowires) and the superconducting proximity effect (induction of superconductivity in neighboring metal or semiconductors).
From 2000 he turned to spintronics . With Laurens Molenkamp , he pointed out incompatibility in conductivity ( conductance mismatch ) as the main obstacle to injection of spin-polarized electrons from a ferromagnet into semiconductors. His group pioneered the use of graphene in spintronics and in 2007 demonstrated spin transport in graphene at room temperature for the first time. Using various methods, they were able to improve the initially low efficiency of the injection of spin-polarized electrons from ferromagnets onto graphene from 10 to 60%. He also did research on thermoelectricity and spintronics.
He is also working on molecular switches with his fellow chemist Ben Feringa in Groningen.
In 2016 he received the Spinoza Prize . In 2014 he became a Fellow of the American Physical Society . In 1993 he received the Shell Award with Henk van Houten and Carlo Beenakker.
Fonts
- with H. van Houten, CWJ Beenakker, J. Gr. Williamson, LP Kouwenhoven , D. van der Marel, CT Foxon: Quantized conductance of point contacts in a two-dimensional electron gas, Physical Review Letters, Volume 60, 1988, p. 848, abstract
- with G. Schmidt, L. Molenkamp, AT Filip: A fundamental obstacle for electrical spin injection from a ferromagnetic metal into a diffusive semiconductor, Phys. Rev. B, Vol. 62, 2000, p. 4790
- with FJ Jedema, AT Filip: Electrical spin injection and accumulation at room temperature in an all-metal mesoscopic spin valve, Nature, Volume 410, 2001, pp. 345-348
- with N. Tombros, C. Josza, M. Popinciuc, HT Jonkman: Electronic spin transport and spin precession in single graphene layers at room temperature, Nature, Volume 448, 2007, pp. 571-574
- with GEW Bauer, E. Saitoh: Spin caloritronics, Nature Materials, Volume 11, 2012, p. 391
- with PJ Zomer, MHD Guimarães, N. Tombros: Long-distance spin transport in high-mobility graphene on hexagonal boron nitride, Phys. Rev. B, Volume 86, 2012, p. 161416
Web links
- Homepage Groningen
- Videos by and about Bart van Wees in the AV portal of the Technical Information Library
Individual evidence
- ↑ Beenakker, Houten, van Wees: Quantum Point Contacts, Semiconductors and Semimetals, Volume 35, 1992, pp. 9-112
- ↑ G. Schmidt, Molenkamp, van Wees u. a., Phys. Rev. B, Rapid Communication, Volume 62, 2000, R 4790
- ^ Francis Sedgemore: Graphene Spintronics
| personal data | |
|---|---|
| SURNAME | Wees, Bart van |
| ALTERNATIVE NAMES | Wees, Bart Jan van |
| BRIEF DESCRIPTION | Dutch physicist |
| DATE OF BIRTH | 4th August 1961 |
| PLACE OF BIRTH | Nootdorp |