News

  • 15.04.2019

    Voltage-tunable Majorana bound states in time-reversal symmetric bilayer quantum spin Hall hybrid

    We investigate hybrid structures based on a bilayer quantum spin Hall system in proximity to an s-wave superconductor as a platform to mimic time-reversal symmetric topological superconductors.

  • 05.04.2019

    Transport signatures of a quantum spin Hall - chiral topological superconductor junction

    We investigate transport through a normal-superconductor (NS) junction made from a quantum spin Hall (QSH) system and a chiral topological superconductor (TSC) using a two-dimensional extended four-band model for HgTe-based quantum wells in a magnetic (Zeeman) field and subject to s-wave superconductivity.

  • 29.03.2019

    Feasible model for photo-induced interband pairing

    Recently, it has been proposed that a mechanism for the appearance of non-equilibrium superconductivity in a resonantly driven semiconductor with repulsive interband interactions exists.

  • 28.03.2019

    Massive Dirac Fermion at the Surface of the van der Waals Antiferromagnet MnBi$_2$Te$_4$

    The layered van der Waals compound MnBi$_2$Te$_4$ has been predicted to combine the band ordering of archetypical topological insulators like Bi$_2$Te$_3$ with the magnetism of Mn, making this material a viable candidate for the realization of various magnetic topological states.

  • 20.03.2019

    Exploring the Kondo effect of an extended impurity with chains of Co adatoms in a magnetic field

    Motivated by recent STM experiments, we explore the magnetic field induced Kondo effect that takes place at symmetry protected level crossings in finite Co adatom chains.

  • 12.03.2019

    Magnon Landau levels and emergent supersymmetry in strained antiferromagnets

    Inhomogeneous strain applied to lattice systems can induce artificial gauge fields for particles moving on this lattice.

  • 06.03.2019

    Pressure-tuning the quantum spin Hamiltonian of the triangular lattice antiferromagnet Cs2CuCl4

    Quantum triangular-lattice antiferromagnets are important prototype systems to investigate numerous phenomena of the geometrical frustration in condensed matter.

  • 06.03.2019

    Rod motifs in neutron scattering in spin ice

    In classical and quantum spin ice, rodlike features appear in the neutron-scattering structure factor when the pinch points characteristic of classical spin ice get washed out.

  • 24.02.2019

    Polarization Plateaus in Hexagonal Water Ice $I_h$

    The protons in water ice are subject to so called \emph{ice rules} resulting in an extensive ground state degeneracy.

  • 20.02.2019

    Magnetization beyond the Ising limit of ${\mathrm{Ho}}_{2}{\mathrm{Ti}}_{2}{\mathrm{O}}_{7}$

    We report that the local Ising anisotropy in pyrochlore oxides—the crucial requirement for realizing the spin-ice state—can be broken by means of high magnetic fields.

  • 19.02.2019

    $h/e$ Oscillations in Interlayer Transport of Delafossites

    Transport of electrons in a metal is usually well captured by their particle-like aspects, while their wavelike nature is commonly unobservable.

  • 13.02.2019

    Quantum magnetism in minerals

    The discovery of magnetism by the ancient Greeks was enabled by the natural occurrence of lodestone – a magnetized version of the mineral magnetite.

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