Browsing NTNU Open by Author "Buhmann, Hartmut"

Now showing items 1-4 of 4

    • Approaching Quantization in Macroscopic Quantum Spin Hall Devices through Gate Training 

      Lunczer, Lukas; Leubner, Philipp; Endres, Martin; Muller, Valentin L; Brüne, Christoph; Buhmann, Hartmut; Molenkamp, Laurens W (Journal article; Peer reviewed, 2019)
      Quantum spin Hall edge channels hold great promise as dissipationless one-dimensional conductors.However, the ideal quantized conductance of2e2=his only found in very short channels-in contradictionwith the expected ...

    • Proximity-Induced Superconductivity in CdTe-HgTe Core-Shell Nanowires 

      Hajer, Jan; Kessel, Maximilian; Brüne, Christoph; Stehno, Martin P; Buhmann, Hartmut; Molenkamp, Laurens W (Journal article; Peer reviewed, 2019)
      In this Letter we report on proximity superconductivity induced in CdTe–HgTe core–shell nanowires, a quasi-one-dimensional heterostructure of the topological insulator HgTe. We demonstrate a Josephson supercurrent in our ...

    • Residual strain in free-standing CdTe nanowires overgrown with HgTe 

      Kessel, Maximilian; Lunczer, Lukas; Tarakina, Nadezda V; Brüne, Christoph; Buhmann, Hartmut; Molenkamp, Laurens W (Journal article; Peer reviewed, 2019)
      We investigate the crystal properties of CdTe nanowires overgrown with HgTe. Scanning electron microscopy and scanning transmission electron microscopy confirm that the growth results in a high ensemble uniformity and that ...

    • Selective area grown ZnTe nanowires as the basis for quasi-one-dimensional CdTe-HgTe multishell heterostructures 

      Hajer, Jan; Mantei, Willi; Kessel, Maximilian; Brüne, Christoph; Wenner, Sigurd; Van Helvoort, Antonius; Buhmann, Hartmut; Molenkamp, Laurens W. (Peer reviewed; Journal article, 2020)
      Selective area growth is employed in the vapor-liquid-solid molecular beam epitaxy of ZnTe nanowire arrays. Full control over the location of the individual nanowires is achieved by defined positioning of the growth catalyst. ...