Előadó: Németh Róbert (Eötvös Loránd Tudományegyetem (host: Kiss Tamás))
Előadás címe: Aharonov–Bohm Effect in Multiband Electron Systems
Dátum: 2023. április 25., kedd 10 óra
Helyszín: 1-es épület, 2. emeleti Tanácsterem
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 , 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.
: R Németh, J Cserti: Unified Description of the Aharonov–Bohm Effect in Isotropic Multiband Electronic Systems, arXiv:2302.07050