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The Fulde–Ferrell–Larkin–Ovchinnikov state for ultracold fermions in lattice and harmonic potentials: a review

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      Topological Insulators

       ,   (2011)
      Topological insulators are electronic materials that have a bulk band gap like an ordinary insulator, but have protected conducting states on their edge or surface. The 2D topological insulator is a quantum spin Hall insulator, which is a close cousin of the integer quantum Hall state. A 3D topological insulator supports novel spin polarized 2D Dirac fermions on its surface. In this Colloquium article we will review the theoretical foundation for these electronic states and describe recent experiments in which their signatures have been observed. We will describe transport experiments on HgCdTe quantum wells that demonstrate the existence of the edge states predicted for the quantum spin Hall insulator. We will then discuss experiments on Bi_{1-x}Sb_x, Bi_2 Se_3, Bi_2 Te_3 and Sb_2 Te_3 that establish these materials as 3D topological insulators and directly probe the topology of their surface states. We will then describe exotic states that can occur at the surface of a 3D topological insulator due to an induced energy gap. A magnetic gap leads to a novel quantum Hall state that gives rise to a topological magnetoelectric effect. A superconducting energy gap leads to a state that supports Majorana fermions, and may provide a new venue for realizing proposals for topological quantum computation. We will close by discussing prospects for observing these exotic states, a well as other potential device applications of topological insulators.
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        Dynamical mean-field theory of strongly correlated fermion systems and the limit of infinite dimensions

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          Theory of Superconductivity

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            Author and article information

            Journal
            Reports on Progress in Physics
            Rep. Prog. Phys.
            IOP Publishing
            0034-4885
            1361-6633
            April 01 2018
            April 01 2018
            February 19 2018
            : 81
            : 4
            : 046401
            10.1088/1361-6633/aaa4ad
            © 2018

            http://iopscience.iop.org/info/page/text-and-data-mining

            http://iopscience.iop.org/page/copyright

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