Journal
PHYSICAL REVIEW LETTERS
Volume 125, Issue 23, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.125.236802
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Funding
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy through the Wurzburg-Dresden Cluster of Excellence on Complexity and Topology in Quantum Matter [EXC 2147, 390858490]
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy through Collaborative Research Center (CRC) [Transregio 183]
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) [EI 519/7-1, MI 658/10-1]
- ERC under the European Union [788715]
- BSF [2018643]
- NSF [2018643]
- ISF [1866/17]
- ISF Quantum Science and Technology [2074/19]
- German-Israeli Foundation [I-1505303.10/2019]
- European Research Council (ERC) [788715] Funding Source: European Research Council (ERC)
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The quest for non-Abelian quasiparticles has inspired decades of experimental and theoretical efforts, where the scarcity of direct probes poses a key challenge. Among their clearest signatures is a thermal Hall conductance with quantized half-integer value in units of kappa(0) = pi(2)k(B)(2)T/3h (T is temperature, h the Planck constant, k(B) the Boltzmann constant). Such values were recently observed in a quantum-Hall system and a magnetic insulator. We show that nontopological thermal metal phases that form due to quenched disorder may disguise as non-Abelian phases by well approximating the trademark quantized thermal Hall response. Remarkably, the quantization here improves with temperature, in contrast to fully gapped systems. We provide numerical evidence for this effect and discuss its possible implications for the aforementioned experiments.
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