Quantum Hall effect in graphene: Status and prospects S Sahoo Department of Physics, National Institute of Technology, Durgapur 713 209, West Bengal, India E-mail: sukadevsahoo@yahoo.com Received 22 December 2010; revised 16 March 2011; accepted 29 March 2011 Graphene is the recently discovered two-dimensional (2D) one atom thick allotrope of carbon. Mele. E-mail address: janusz.jacak@pwr.edu.pl. Department of Quantum Technologies, Faculty of Fundamental Problems of Technology, Wrocław University of Science and Technology, Wrocław, Poland. Quantum hall effect in graphene Abstract: Graphene is the first example of truly two-dimensional crystals - it's just one layer of carbon atoms. The quantum Hall (QH) effect in two-dimensional electron and hole gas is studied in high quality graphene samples. Graphene properties can be manipulated by a periodic potential. Graphene properties can be manipulated by a periodic potential. We have realized an integer quantum Hall system with superconducting contacts by connecting graphene to niobium electrodes. 2D materials; quantum Hall effect; topological insulators; symmetry-protected phases; trilayer graphene; In the conventional Hall effect, a charge current combines with a perpendicular magnetic field B ⊥ to yield a steady state with a transverse chemical potential gradient. Due to these superior properties, a lot of research is being done with this material. Electrons in graphene, obeying … Title: Quantum Spin Hall Effect in Graphene. Title: Unconventional Integer Quantum Hall effect in graphene Authors: V.P. The quantum Hall (QH) effect in two-dimensional electron and hole gas is studied in high quality graphene samples. Based on the tight-binding model, we study graphene under a one-dimensional (1D) modulated magnetic field which contains both a uniform and a staggered component.

In particular, special attention is paid to the derivation of the conditions under which gapless edge states exist in the spectrum of graphene with "zigzag" and "armchair" edges. We report the realization of a single-layer graphene p-n junction in which carrier type and density in two adjacent regions are locally controlled by electrostatic gating. Graphene samples whose lateral size … Readers are referred to Chapter 4 for the basic concepts of quantum Hall effects in semiconductors, e.g. Graphene is a two-dimensional sheet of carbon atoms with properties that are superior to other materials. Below their upper critical field of 4 T, an integer quantum Hall effect coexists with superconductivity in the leads but with a plateau conductance that is larger than in the normal state. Disappointingly, however, the QHE has been observed … Based on the tight-binding model, we study graphene under a one-dimensional (1D) modulated magnetic field which contains both a uniform and a staggered component. We have realized an integer quantum Hall system with superconducting contacts by connecting graphene to niobium electrodes. Search for more papers by this author . It has also led to the establishment of a new metrological standard, the resistance quantum. Authors: C.L. The quantum Hall effect (QHE), one example of a quantum phenomenon that occurs on a truly macroscopic scale, has attracted intense interest since its discovery in 1980 and has helped elucidate many important aspects of quantum physics.

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