ELFT HÍRADÓ

[Miklós Werner <wernermiklos AT gmail.com>]

A BME-MTA Egzotikus Kvantumfázisok csoport következő szemináriuma:

*Matthias Droth (BME)*
"Electron-electron attraction in graphene electromechanical systems"

*Időpont és helyszín:*
2017. október 30. 14:15
BME Elméleti Fizika Tanszék szemináriumi szobája (F épület, 3. lépcsőház,
magasföldszint)

*Kivonat:*
"Two electrons in a quantum dot repel each other: their interaction can be
characterized by a positive interaction energy. From the theory of
superconductivity, we also know that mechanical vibrations of the crystal
lattice can make the electron-electron interaction attractive. Analogously,
if a quantum dot interacts with a mechanical degree of freedom, the
effective interaction energy can be negative; that is, the
electron-electron interaction might be attractive. In this work, we propose
and theoretically study an engineered electromechanical system that
exhibits electron-electron attraction: a quantum dot suspended on a
nonlinear mechanical resonator, tuned by a bottom and a top gate electrode.
We focus on the example of a dot embedded in a suspended graphene ribbon,
for which we identify conditions for electron-electron attraction. Our
results suggest the possibility of electronic transport via tunneling of
packets of multiple electrons in such devices, similar to that in
superconducting nanostructures, but without the use of any superconducting
elements."

Minden érdeklődőt szeretettel várunk.

A szemináriumsorozat további programja:
http://physics.bme.hu/seminar_eqp?language=en

Üdvözlettel,
Werner Miklós Antal