Area A - Topological Electrons

The main research objectives of Area A are devoted to the development of novel topological materials, the investigation of the interplay of electronic correlations and spin-orbit coupling in topological systems, the exploitation of superconducting hybrid systems as seeds for emergent particles, such as Majorana- or parafermions, the interaction between light and matter with respect to axion electrodynamics, and hydrodynamic transport phenomena in electronic systems based on Dirac fermions.

Recent Publications

  • 25.11.2019

    Detection of second-order topological superconductors by Josephson junctions

    We study Josephson junctions based on a second-order topological superconductor (SOTS) which is realized in a quantum spin Hall insulator with a large inverted gap in proximity to an unconventional superconductor.

  • 28.10.2019

    Tomonaga–Luttinger liquid in the edge channels of a quantum spin Hall insulator

    Quantum spin Hall insulators are two-dimensional materials that host conducting helical electron states strictly confined to the one-dimensional boundaries.

  • 08.10.2019

    Boundary-condition and geometry engineering in electronic hydrodynamics

    We analyze the role of boundary geometry in viscous electronic hydrodynamics.

  • 07.10.2019

    {Large resistivity reduction in mixed-valent CsAuBr3 under pressure}

    We report on high-pressure p≤45 GPa resistivity measurements on the perovskite-related mixed-valent compound CsAuBr3.

  • 03.10.2019

    {Internal screening and dielectric engineering in magic-angle twisted bilayer graphene}

    Magic-angle twisted bilayer graphene (MA-tBLG) has appeared as a tunable testing ground to investigate the conspiracy of electronic interactions, band structure, and lattice degrees of freedom to yield exotic quantum many-body ground states in a two-dimensional (2D) Dirac material framework.

  • 16.09.2019

    {Orthogonal metal in the Hubbard model with liberated slave spins}

    A two-dimensional Falicov-Kimball model, equivalent to the Hubbard model in an unconstrained slave-spin representation, is studied by quantum Monte Carlo simulations.

  • 09.09.2019

    {Transport properties of topologically non-trivial bismuth tellurobromides BinTeBr}

    Temperature-dependent transport properties of the recently discovered layered bismuth-rich tellurobromides BinTeBr (n = 2, 3) are investigated for the first time.

  • 05.09.2019

    Superconductivity of Organic Charge-Transfer Salts

    Forty years after the discovery of the first organic superconductor, the nature of the superconducting state in these materials is still not fully understood.

  • 03.09.2019

    {Non-Abelian statistics in one dimension: Topological momentum spacings and SU(2) level-k fusion

    We use a family of critical spin chain models discovered recently by one of us {[}M. Greiter, Mapping of Parent Hamiltonians (Springer, Berlin, 2011)].

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