ELFT HÍRADÓ

[Janos Asboth <asboth.janos AT ttk.bme.hu>]

Meghívó

BME Elméleti Fizika Szeminárium,

ápr. 14. péntek 10h15,

1111 Budapest, Budafoki út 8., BME F III. magasföldszint 01.,
Elméleti Fizika Tanszék szemináriumi szoba

Németh Róbert (ELTE Komplex Rendszerek Fizikája tanszék)
Aharonov–Bohm Effect in Multiband Electron Systems

In 1959, Yakir Aharonov and David Bohm discovered theoretically that the
quantum mechanical scattering of charged particles on an infinitesimally
thin solenoid differs significantly from its classical counterpart. After
its experimental verification by Robert Chambers in 1960, the Aharonov–Bohm
effect became a widely known phenomenon supporting quantum theory. In their
original paper, Aharonov and Bohm presented the analytical solution of the
scattering problem for spinless charged particles. In our paper [1], we
present a unified treatment for two-dimensional multiband electronic
systems possessing isotropic band structures. We propose an integral
representation of the scattering state and derive its asymptotic form to
obtain the differential cross section. A rather surprising result emerges:
this cross section is the same for all isotropic systems and agrees with
the original formula by Aharonov and Bohm. To demonstrate the generality of
our theory, we apply it to several specific multiband systems relevant in
condensed matter physics.

[1]: R Németh, J Cserti: Aharonov–Bohm Effect in Multiband Electron
Systems, arXiv:2302.07050

Minden érdeklődőt szeretettel várunk.
Asbóth János,
 szemináriumi koordinátor