Sign reversal of the flux flow Hall effect

We present a phenomenological theory of the Hall effect sign reversal in type II superconductors taking into account the normal carriers scattering and the topological contribution to Hall conductivity and show that the latter contribution leads to a double sign change of the Hall conductivity. We report an experimental observation of the double sign reversal in atomically thin BSCCO and find a quantitative agreement between the experimentally observed Hall resistance and our theoretical predictions.

In collaboration with: Frank Zhao, Margaret G. Panetta, Cyndia Yu, Jedediah Johnson, Hyobin Yoo, Philip Kim, Harvard University; Nicola Poccia, Institute of Metallic Materials at IFW; Ruidan Zhong, Genda Gu, Brookhaven National Laboratory; Kenji Watanabe, Takashi Taniguchi, National Institute for Materials Science, Tsukuba; Svetlana Postolova, Institute for Physics of Microstructures RAS, Nizhny Novgorod; Mikhail Feigelman, Landau Institute; Vadim B. Geshkenbein, ETH-Zuerich; Anatoly Larkin, University of Minnesota