ELFT HÍRADÓ

[Mihaly Gyorgy <mihaly AT szfki.hu>]

                                 MEGHIVÓ
a BME Fizikai Intézet, Fizika Tanszék szemináriumára

                         Christian Schönenberger

Spin and Charge Transport in Carbon Nanotube Hybrid Quantum Dots

Swiss Nanoscience Institute and Department of Physics at the University of 
Basel, Switzerland.
http://pages.unibas.ch/phys-meso/

Az elõadás helye: BME Fizikai Intézet, Fizika Tanszék
Budafoki út 8. F-épület, III. lépcsõház, II. emelet 13.
Ideje: 2008. április 28. hétfõ, 16:15.

Abstract:
Charge transport at the ultimate limit is transport through a localized, 
zero-dimensional state. Such 0d objects, also called quantum dots or 
artificial atoms, can be embodied in various inorganic (semiconducting 
2DEGs, synthesized nanoparticles) systems. However, transport studies 
through such artificial atoms have been restricted to normal electrodes. It 
is only since very recent, that we are able to fabricate superconducting 
and ferromagnetic electrodes to quantum dots. This has first been made 
possible by carbon nanotube (CNT) quantum dots, which are exceptional in 
that they allow for hybrid quantum dots with both superconducting and 
ferromagnetic contacts. Very recently, the same could be achieved in 
semiconducting nanowires. New physics emerge from studies of these hybrids 
in which spindependent phenomena can be studied in 0d.

After a brief introduction, in which I would like to stress the new 
possibilities offered by referring to CNTs. I will focus on recent results 
from our research at Basel in the area of the proximity effect and 
spintransport in two and multi-terminal devices.

For a brief review, see: C. Schönenberger, Charge and Spin Transport in 
Carbon Nanotubes, Semicond.
Sci. Technol. 21, S1-9 (2006).

The work is a collaborative effort including the following researcher (in 
alphabetic order):
W. Belzig, C. Bruder, S. Csonka, A. Cottet, A. Eichler, M. Gräber, G. 
Gunnarsson, D. Keller, A. Kleine, T. Kontos, J. Nygaard, S. Oberholzer, S. 
Sahoo, J. Trbovic, and M. Weiss.



G. Mihaly
Department of Physics
Budapest University of Technology and Economics
http://dept.phy.bme.hu/