Sign reversal of the flux flow Hall effect

 · Invited

Abstract

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

*The experiments were supported by NSF (DMR-1809188) and the Moore Foundation EPiQS Initiative (GBMF4543). Stencil masks were fabricated at Harvard CNS, a part of National Nanotechnology Coordinated Infrastructure, NSF 1541959. Theoretical work at Argonne (V.M.V) is supported by the U.S. Department of Energy, Basic Energy Sciences, Materials Sciences and Engineering Division. S. Y. F. Z. and N. P. were partially supported by NSERC PGS and ARO (W911NF-17-1-0574). G. D. G., R. Z., V. M. V. are supported by the U.S. Department of Energy under Contract No. de-sc0012704, Center for Emergent Superconductivity, an Energy Frontier Research Center. S. V. P. is supported by the Russian Science Foundation, Grant No. 15-12-10020.

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Presenters

  • Valerii Vinokour

    • Argonne Natl Lab

Authors

  • Valerii Vinokour

    • Argonne Natl Lab