The cross-sectional dimensions of nanowires set the quantization conditions for the electronic su... more The cross-sectional dimensions of nanowires set the quantization conditions for the electronic subbands they host. These can be used as a platform to realize one-dimesional topological superconductivity. Here we develop a protocol that forces such nanowires to kink and change their growth direction. Consequently, a thin rectangular nanoplate is formed, which gradually converges into a very thin square tip. We characterize the resulting tapered nanowires structurally and spectroscopically by scanning and transmission electron microscopy and scanning tunneling microscopy and spectroscopy and model their growth. A unique structure composed of ordered rows of atoms on the (110) facet of the nanoflag is further revealed by atomically resolved topography and modeled by simulations. We discuss possible advantages tapered InAs nanowires offer for Majorana zero-mode realization and manipulation.
Zenodo (CERN European Organization for Nuclear Research), Aug 21, 2021
Raw data of the main text figures. The files can be opened using either MATLAB (*.fig) or Gwyddio... more Raw data of the main text figures. The files can be opened using either MATLAB (*.fig) or Gwyddion (*.gwy).
Mn12-tBuAc, like the better-known single-molecule magnet Mn12-Ac, relaxes between up and down spi... more Mn12-tBuAc, like the better-known single-molecule magnet Mn12-Ac, relaxes between up and down spin states by thermally assisted resonant tunneling when a longitudinal magnetic field (HL) brings energy levels into resonance. In Mn12-Ac, tunneling is induced by a second-order transverse anisotropy produced by local solvent disorder. Such disorder makes the observation of any possible geometric-phase interference effect impractical. Mn12-tBuAc, in contrast,
The cross-sectional dimensions of nanowires set the quantization conditions for the electronic su... more The cross-sectional dimensions of nanowires set the quantization conditions for the electronic subbands they host. These can be used as a platform to realize one-dimesional topological superconductivity. Here we develop a protocol that forces such nanowires to kink and change their growth direction. Consequently, a thin rectangular nanoplate is formed, which gradually converges into a very thin square tip. We characterize the resulting tapered nanowires structurally and spectroscopically by scanning and transmission electron microscopy and scanning tunneling microscopy and spectroscopy and model their growth. A unique structure composed of ordered rows of atoms on the (110) facet of the nanoflag is further revealed by atomically resolved topography and modeled by simulations. We discuss possible advantages tapered InAs nanowires offer for Majorana zero-mode realization and manipulation.
Zenodo (CERN European Organization for Nuclear Research), Aug 21, 2021
Raw data of the main text figures. The files can be opened using either MATLAB (*.fig) or Gwyddio... more Raw data of the main text figures. The files can be opened using either MATLAB (*.fig) or Gwyddion (*.gwy).
Mn12-tBuAc, like the better-known single-molecule magnet Mn12-Ac, relaxes between up and down spi... more Mn12-tBuAc, like the better-known single-molecule magnet Mn12-Ac, relaxes between up and down spin states by thermally assisted resonant tunneling when a longitudinal magnetic field (HL) brings energy levels into resonance. In Mn12-Ac, tunneling is induced by a second-order transverse anisotropy produced by local solvent disorder. Such disorder makes the observation of any possible geometric-phase interference effect impractical. Mn12-tBuAc, in contrast,
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Papers by Nurit Avraham