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Andre K. Geim
Researcher at University of Manchester
Publications - 466
Citations - 232754
Andre K. Geim is an academic researcher from University of Manchester. The author has contributed to research in topics: Graphene & Magnetic field. The author has an hindex of 125, co-authored 445 publications receiving 206833 citations. Previous affiliations of Andre K. Geim include University of Nottingham & Russian Academy of Sciences.
Papers
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Nanofabricated media with negative permeability at visible frequencies
Alexander N. Grigorenko,Andre K. Geim,Helen F. Gleeson,Y. Zhang,A. A. Firsov,Igor Khrushchev,Jovana Petrović +6 more
TL;DR: A nanofabricated medium consisting of electromagnetically coupled pairs of gold dots with geometry carefully designed at a 10-nm level exhibits a strong magnetic response at visible-light frequencies, including a band with negative µ.
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Spectroscopic ellipsometry of graphene and an exciton-shifted van Hove peak in absorption
Vasyl G. Kravets,Alexander N. Grigorenko,Rahul R. Nair,Peter Blake,S. Anissimova,Kostya S. Novoselov,Andre K. Geim +6 more
TL;DR: In this article, the optical transparency of any two-dimensional system with a symmetric electronic spectrum is governed by the fine structure constant and suggest a simple formula that relates a quasiparticle spectrum to an optical absorption of such a system.
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Single-Layer Behavior and Its Breakdown in Twisted Graphene Layers
Adina Luican,Guohong Li,Alfonso Reina,Jing Kong,Rahul R. Nair,Kostya S. Novoselov,Andre K. Geim,Eva Y. Andrei +7 more
TL;DR: High magnetic field scanning tunneling microscopy and Landau level spectroscopy of twisted graphene layers grown by chemical vapor deposition observe an unexpected electron-hole asymmetry which is substantially larger than the asymmetry in either single or untwayer graphene.
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Impermeable barrier films and protective coatings based on reduced graphene oxide
TL;DR: In this article, the authors report barrier properties of multilayer graphitic films made by gentle chemical reduction of graphene oxide laminates with hydroiodic and ascorbic acids.
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Tunable metal-insulator transition in double-layer graphene heterostructures
Leonid Ponomarenko,Andre K. Geim,Andrey A. Zhukov,Rashid Jalil,Sergey V. Morozov,Kostya S. Novoselov,Irina V. Grigorieva,E. H. Hill,Vadim Cheianov,Vladimir I. Fal'ko,Kenji Watanabe,Takashi Taniguchi,Roman V. Gorbachev +12 more
TL;DR: In this paper, the authors reported a strong Anderson localization and the corresponding metal-insulator transition in ultra-high-quality graphene, where the transition is controlled externally, by changing the carrier density in another graphene layer placed at a distance of several nm and decoupled electrically.