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Emergent quantum Hall effects below 50 mT in a two-dimensional topological insulator

2020/03/31 by Saquib Shamim, Wouter Beugeling, J. Böttcher +10
Materials Science · Mathematics · Physics and Astronomy · #Biology #Combinatorics #Condensed matter physics #Electron #Graphene research and applications #Insulator (electricity) #Mathematics #Optoelectronics #Physics #Quantum #Quantum Hall effect #Quantum and electron transport phenomena #Quantum mechanics #Topological Materials and Phenomena #Topological insulator #Topology (electrical circuits) #cond-mat.mes-hall

paper · pdf · doi:10.1126/sciadv.aba4625

published as Sci. Adv. 6, eaba4625 (2020)

arxiv created 2020/03/31 · openalex publication_date 2020/06/24 · arxiv updated 2020/06/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

-regime, we resolve quantum Hall plateaus at fields as low as 20 to 30 mT, where transport is dominated by a van Hove singularity in the valence band. These emergent quantum Hall phenomena rely critically on the topological band structure of HgTe, and their occurrence at very low fields makes them an ideal candidate for realizing chiral Majorana fermions.

Citations