[qmeso-seminar] семинар 9 февраля

[Quantum Mesoscopics Dept.]

СЕМИНАР СЕКТОРА КВАНТОВОЙ МЕЗОСКОПИКИ

пятница 9 февраля, 15:00, онлайн


Hrant Topchyan (Yerevan Physics Institute, Armenia)

Integer Quantum Hall Effect: random network models, induction of gravity and S-matrix approach


The widely accepted Chalker-Coddington model of IQHE has the problem of inconsistency between numerical and experimental
values of localization length exponent. Recently it was shown that taking into account the random geometrical structure
of the scattering network itself alongside U(1) phase disorder has the capability of fixing the discrepancy. The
geometrical randomness is introduced through specific parametrized modification of the regular network model. A
correspondence between the created structure to the real-life potential based scattering network structure is
established through curvature distribution analysis, a connection between random network parameters and experimentally
measurable compensation parameter is predicted. The issue of reliability of numerical calculations is addressed by
introducing a more robust and faster technique, namely the S-matrix approach. New calculations verify the previously
known results and provide better precision.



[Трансляция: https://zoom.us/j/96948399564?pwd=RXlKbW96Qm1tZEV6SHB0Q2JYeTdrdz09]

подробнее: http://qmeso.itp.ac.ru/seminars.php?abstract=true