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Cossa xe... the integer quantum Hall effect and the Kubo formula?

Giovanna Marcelli
Friday, March 5, 2021 - 11:00 to 12:00

I will explain the integer quantum Hall effect starting from its discovery by K. von Klitzing in 1980’s and then to shed some light on its interpretation as a bulk phenomenon by introducing the Hall conductance, which is defined as the ratio between the charge current intensity and the electric potential drop measured in orthogonal directions. Finally, I will set up the linear response paradigm given by the Kubo formula to compute the Hall conductance, whose expression can be related to the Chern number, which is an integer. 

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