Electron Spectroscopy of Single Quantum Objects To Directly Correlate the Local Structure to Their Electronic Transport and Optical Properties

Autor(en)

Ryosuke Senga, Thomas Pichler, Kazu Suenaga

Abstrakt

Physical property of a single quantum object is governed by its precise atomic arrangement. The direct correlation of localized physical properties with the atomic structures has been therefore strongly desired but still limited in the theoretical studies. Here, we have successfully examined the localized electronic properties of individual carbon nanotubes by means of high-resolution electron energy-loss spectroscopy combined with high-resolution transmission electron microscopy. Well-separated sharp peaks at the carbon K(1s) absorption edge and in the valence-loss spectra are obtained from a single freestanding carbon nanotube with the local chiral index and unambiguously identified as the transitions between the van Hove singularities. The spectra features clearly vary upon the different areas even in the individual carbon nanotube. Variations in interband transitions, plasmonic behaviors, and unoccupied electronic structures are clearly attributed to the local irregular atomic arrangement such as topological defect and/or elastic bond stretching.

Organisation(en)

Elektronische Materialeigenschaften

Externe Organisation(en)

National Institute of Advanced Industrial Science and Technology (AIST)

Journal

Nano Letters: a journal dedicated to nanoscience and nanotechnology

Band

16

Seiten

3661-3667

Anzahl der Seiten

7

ISSN

1530-6984

DOI

https://doi.org/10.1021/acs.nanolett.6b00825

Publikationsdatum

06-2016

Peer-reviewed

Ja

ÖFOS 2012

103018 Materialphysik

Schlagwörter

ASJC Scopus Sachgebiete

Condensed Matter Physics, Mechanical Engineering, Bioengineering, Allgemeine Chemie, Allgemeine Materialwissenschaften

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/3332d835-03ec-42cb-8fbb-35ef81e41c52