Type of Publication: | Journal article |
URI (citable link): | http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-32304 |
Author: | Ossipov, A.; Titov, M.; Beenakker, Carlo W. J. |
Year of publication: | 2007 |
Published in: | Physical Review B ; 75 (2007). - pp. 1-4 |
DOI (citable link): | https://dx.doi.org/10.1103/PhysRevB.75.241401 |
Summary: |
We study the interplay of Klein tunneling (=interband tunneling) between n-doped and p-doped regions in graphene and Andreev reflection (=electron-hole conversion) at a superconducting electrode. The tunneling conductance of an n-p-n junction initially increases upon lowering the temperature, while the coherence time of the electron-hole pairs is still less than their lifetime, but then drops back again when the coherence time exceeds the lifetime. This reentrance effect, known from diffusive conductors and ballistic quantum dots, provides a method to detect phase coherent Klein tunneling of electron-hole pairs.
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PACS Classification: | 73.23.-b; 74.45.+c; 74.50.+r; 73.40.Lq |
Subject (DDC): | 530 Physics |
Link to License: | Attribution-NonCommercial-NoDerivs 2.0 Generic |
OSSIPOV, A., M. TITOV, Carlo W. J. BEENAKKER, 2007. Reentrance effect in a graphene n-p-n junction coupled to a superconductor. In: Physical Review B. 75, pp. 1-4. Available under: doi: 10.1103/PhysRevB.75.241401
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PhysRevB_75_241401.pdf | 600 |