P
Petr Stepanov
Researcher at ICFO – The Institute of Photonic Sciences
Publications - 43
Citations - 2984
Petr Stepanov is an academic researcher from ICFO – The Institute of Photonic Sciences. The author has contributed to research in topics: Bilayer graphene & Graphene. The author has an hindex of 19, co-authored 39 publications receiving 1609 citations. Previous affiliations of Petr Stepanov include Ohio State University & Moscow Institute of Physics and Technology.
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Journal ArticleDOI
Superconductors, orbital magnets and correlated states in magic-angle bilayer graphene
Xiaobo Lu,Petr Stepanov,Wei Yang,Ming Xie,Mohammed Ali Aamir,Ipsita Das,C. Urgell,Kenji Watanabe,Takashi Taniguchi,Guangyu Zhang,Adrian Bachtold,Allan H. MacDonald,Dmitri K. Efetov +12 more
TL;DR: In this paper, the authors report the fabrication of magic-angle twisted bilayer graphene devices with highly uniform twist angles, which enables the observation of new superconducting domes, orbital magnets and Chern insulating states.
Journal ArticleDOI
Superconductors, Orbital Magnets, and Correlated States in Magic Angle Bilayer Graphene
Xiaobo Lu,Petr Stepanov,Wei Yang,Ming Xie,Mohammed Ali Aamir,Ipsita Das,C. Urgell,Kenji Watanabe,Takashi Taniguchi,Guangyu Zhang,Adrian Bachtold,Allan H. MacDonald,Dmitri K. Efetov +12 more
TL;DR: This study shows that broken-symmetry states, interaction-driven insulators, orbital magnets, states with non-zero Chern numbers and superconducting domes occur frequently across a wide range of moiré flat band fillings, including close to charge neutrality.
Journal ArticleDOI
Untying the insulating and superconducting orders in magic-angle graphene
Petr Stepanov,Ipsita Das,Xiaobo Lu,Ali Fahimniya,Kenji Watanabe,Takashi Taniguchi,Frank H. L. Koppens,Johannes Lischner,Leonid Levitov,Dmitri K. Efetov +9 more
TL;DR: Tuning the electronic interactions by changing the dielectric environment of twisted bilayer graphene reveals the disappearance of the insulating states and their replacement by superconducting phases, suggesting a competition between the two phases.
Journal ArticleDOI
Untying the insulating and superconducting orders in magic-angle graphene
Petr Stepanov,Ipsita Das,Xiaobo Lu,Ali Fahimniya,Kenji Watanabe,Takashi Taniguchi,Frank H. L. Koppens,Johannes Lischner,Leonid Levitov,Dmitri K. Efetov +9 more
TL;DR: In this article, the authors show that correlated insulators at half-filling can reappear in small out-of-plane magnetic fields of 0.4 T, giving rise to quantized Hall states with a Chern number of 2.
Journal ArticleDOI
Observation of flat bands in twisted bilayer graphene
Simone Lisi,Xiaobo Lu,Tjerk Benschop,Tobias A. de Jong,Petr Stepanov,José Durán,Florian Margot,Irène Cucchi,Edoardo Cappelli,Andrew Hunter,Anna Tamai,Viktor Kandyba,Alessio Giampietri,Alexei Barinov,Johannes Jobst,Vincent Stalman,Maarten Leeuwenhoek,Maarten Leeuwenhoek,Kenji Watanabe,Takashi Taniguchi,Louk Rademaker,Sense Jan van der Molen,Milan P. Allan,Dmitri K. Efetov,Felix Baumberger,Felix Baumberger +25 more
TL;DR: In this paper, angle-resolved photoemission with simultaneous real and momentum-space resolution (nano-ARPES) was used to directly map the band dispersion in twisted bilayer graphene devices near charge neutrality.