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Showing 1–5 of 5 results
Advanced filters: Author: Oliver Breunig Clear advanced filters

  • Large negative magnetoresistance is usually related to magnetism and the exceptions are rare. Here, Breuniget al. report a large negative magnetoresistance in a topological insulator, TlBi0.15Sb0.85Te2, which is likely due to the Zeeman effect on a barely percolating current path formed in the disordered bulk.

    • Oliver Breunig
    • Zhiwei Wang
    • Yoichi Ando
    ResearchOpen Access
    Nature Communications
    Volume: 8, P: 1-7

  • In topological insulator nanowires quantized Dirac sub-bands are expected, but direct evidence is still missing. Here, the authors report signatures of sub-bands in the gate-voltage dependence of the resistance by tuning the chemical potential in (Bi1−xSbx)2Te3 nanowires through the Dirac point.

    • Felix Münning
    • Oliver Breunig
    • Yoichi Ando
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-6

  • Comparison of terahertz spectroscopy measurements with theoretical results for the Heisenberg–Ising chain antiferromagnet demonstrates the existence of repulsively bound magnons in large transverse fields below the quantum critical point.

    • Zhe Wang
    • Catalin-Mihai Halati
    • Corinna Kollath
    Research
    Nature
    Volume: 631, P: 760-764

  • Topological insulators are unique materials giving rise to unconventional quantum phenomena. This Technical Review discusses how various physics effects can only be observed in devices carefully fabricated to address them, including topological superconductivity, quantum anomalous Hall states, spintronic functionalities and topological mesoscopic physics.

    • Oliver Breunig
    • Yoichi Ando
    Reviews
    Nature Reviews Physics
    Volume: 4, P: 184-193