Nanoscale Three-Dimensional Charge Density and Electric Field Mapping by Electron Holographic Tomography

Nano Letters, vol. 23, pp. 843–849

Abstract

The operation of nanoscale electronic devices is related intimately to the three-dimensional (3D) charge density distributions within them. Here, we demonstrate the quantitative 3D mapping of the charge density and long-range electric field associated with an electrically biased carbon fiber nanotip with a spatial resolution of approximately 5 nm using electron holographic tomography in the transmission electron microscope combined with model-based iterative reconstruction. The approach presented here can be applied to a wide range of other nanoscale materials and devices.

Authors 6

1. Fengshan Zheng corresponding

   Forschungszentrum Jülich · South China University of Technology · State Key Laboratory of Luminescent Materials and Devices · Ernst Ruska Centre

   Affiliation as printed

   Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute, Forschungszentrum Jülich, 52425 Jülich, Germany

   Spin-X Institute, Electron Microscopy Center, School of Physics and Optoelectronics, State Key Laboratory of Luminescent Materials and Devices, Guangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional Materials, South China University of Technology, Guangzhou 511442, China

2. Vadim Migunov Aachen Central Facility for Electron Microscopy

   RWTH Aachen University · Forschungszentrum Jülich · Ernst Ruska Centre

   Affiliation as printed

   Central Facility for Electron Microscopy (GFE), RWTH Aachen University, Ahornstrasse 55, 52074 Aachen, Germany

   Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute, Forschungszentrum Jülich, 52425 Jülich, Germany

3. Jan Caron

   Forschungszentrum Jülich · Ernst Ruska Centre

   Affiliation as printed

   Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute, Forschungszentrum Jülich, 52425 Jülich, Germany

4. Hongchu Du Aachen Central Facility for Electron Microscopy

   RWTH Aachen University · Forschungszentrum Jülich · Ernst Ruska Centre

   Affiliation as printed

   Central Facility for Electron Microscopy (GFE), RWTH Aachen University, Ahornstrasse 55, 52074 Aachen, Germany

   Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute, Forschungszentrum Jülich, 52425 Jülich, Germany

5. Giulio Pozzi

   Forschungszentrum Jülich · University of Modena and Reggio Emilia · Ernst Ruska Centre

   Affiliation as printed

   Department FIM, University of Modena and Reggio Emilia, via G. Campi 213/a, 41125 Modena, Italy

   Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute, Forschungszentrum Jülich, 52425 Jülich, Germany

6. Rafal E. Dunin‐Borkowski

   Forschungszentrum Jülich · Ernst Ruska Centre

   Affiliation as printed

   Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute, Forschungszentrum Jülich, 52425 Jülich, Germany