Bosonic topological insulator intermediate state in the superconductor-insulator transition
arXiv:1906.07969 · doi:10.1016/j.physleta.2020.126570
Abstract
A low-temperature intervening metallic regime arising in the two-dimensional superconductor-insulator transition challenges our understanding of electronic fluids. Here we develop a gauge theory revealing that this emergent anomalous metal is a bosonic topological insulator where bulk transport is suppressed by mutual statistics interactions between out-of-condensate Cooper pairs and vortices and the longitudinal conductivity is mediated by symmetry-protected gapless edge modes. We explore the magnetic-field-driven superconductor-insulator transition in a niobium titanium nitride device and find marked signatures of a bosonic topological insulator behavior of the intervening regime with the saturating resistance. The observed superconductor-anomalous metal and insulator-anomalous metal dual phase transitions exhibit quantum Berezinskii-Kosterlitz-Thouless criticality in accord with the gauge theory.
10 pages, 5 figures
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Cited by in corpus (10)
- Quantum magnetic monopole condensate
- Direct probe of the interior of an electric pion in a Cooper pair superinsulator
- Geometric frustration produces long-sought Bose metal phase of quantum matter
- Topological Nature of High Temperature Superconductivity
- The superconductor-insulator transition in absence of disorder
- Global room-temperature superconductivity in graphite
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- Origin of Topological Order in a Cooper Pair Insulator
- Quantum criticality and multiple crossing points in the magnetoresistance of thin TiN-films