Type of Publication: | Journal article |
Publication status: | Published |
URI (citable link): | http://nbn-resolving.de/urn:nbn:de:bsz:352-0-398446 |
Author: | Tesch, Julia; Leicht, Philipp; Blumenschein, Felix; Gragnaniello, Luca; Bergvall, Anders; Löfwander, Tomas; Fonin, Mikhail |
Year of publication: | 2017 |
Published in: | Physical Review B ; 95 (2017), 7. - 075429. - ISSN 2469-9950. - eISSN 2469-9969 |
ArXiv-ID: | arXiv:1702.07887 |
DOI (citable link): | https://dx.doi.org/10.1103/PhysRevB.95.075429 |
Summary: |
By using Fourier-transform scanning tunneling spectroscopy we measure the interference patterns produced by the impurity scattering of confined Dirac quasiparticles in epitaxial graphene nanoflakes. Upon comparison of the experimental results with tight-binding calculations of realistic model flakes, we show that the characteristic features observed in the Fourier-transformed local density of states are related to scattering between different transverse modes (subbands) of a graphene nanoflake and allow direct insight into the gapped electronic spectrum of graphene. We also observe a strong reduction of quasiparticle lifetime which is attributed to the interaction with the underlying substrate. In addition, we show that the distribution of the on-site energies at flower defects leads to an effectively broken pseudospin selection rule, where intravalley backscattering is allowed.
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Subject (DDC): | 530 Physics |
Comment on publication: | 11 pages, 3 figures |
Link to License: | In Copyright |
Bibliography of Konstanz: | Yes |
TESCH, Julia, Philipp LEICHT, Felix BLUMENSCHEIN, Luca GRAGNANIELLO, Anders BERGVALL, Tomas LÖFWANDER, Mikhail FONIN, 2017. Impurity scattering and size quantization effects in a single graphene nanoflake. In: Physical Review B. 95(7), 075429. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.95.075429
@article{Tesch2017Impur-37934, title={Impurity scattering and size quantization effects in a single graphene nanoflake}, year={2017}, doi={10.1103/PhysRevB.95.075429}, number={7}, volume={95}, issn={2469-9950}, journal={Physical Review B}, author={Tesch, Julia and Leicht, Philipp and Blumenschein, Felix and Gragnaniello, Luca and Bergvall, Anders and Löfwander, Tomas and Fonin, Mikhail}, note={11 pages, 3 figures Article Number: 075429} }
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Tesch_0-398446.pdf | 533 |