2015/11/02 by D. A. Kozlov, D. Bauer, J. Ziegler +9 · 64 citations
Materials Science · Physics and Astronomy · #Capacitance #Condensed matter physics #Electrode #Electron #Electronic and Structural Properties of Oxides #Fermi energy #Fermi surface #Ferroelectricity #Graphene research and applications #Landau quantization #Magnetocapacitance #Measure (data warehouse) #Multiferroics #Physics #Quantum #Quantum capacitance #Quantum mechanics #Quantum oscillations #Surface (topology) #Surface states #Topological Materials and Phenomena #Topological insulator #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevlett.116.166802
published in Physical Review Letters 116(16), 166802 (American Physical Society) · 5 pages of the main text with 3 figures + 10 appendix pages with 7 figures
arxiv created 2015/11/02 · openalex publication_date 2016/04/22 · arxiv updated 2016/04/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We measure the quantum capacitance and probe thus directly the electronic density of states of the high mobility, Dirac type two-dimensional electron system, which forms on the surface of strained HgTe. Here we show that observed magnetocapacitance oscillations probe-in contrast to magnetotransport-primarily the top surface. Capacitance measurements constitute thus a powerful tool to probe only one topological surface and to reconstruct its Landau level spectrum for different positions of the Fermi energy.