Die u:cris Detailansicht:
Magnetic-Field Dependence of Tunnel Couplings in Carbon Nanotube Quantum Dots
- Autor(en)
- Kasper Grove-Rasmussen, Stephan Grap, Jens Paaske, Karsten Flensberg, Sabine Andergassen, Volker Meden, Henrik Ingerslev Jørgensen, Koji Muraki, Toshimasa Fujisawa
- Abstrakt
By means of sequential and cotunneling spectroscopy, we study the tunnel couplings between metallic leads and individual levels in a carbon nanotube quantum dot. The levels are ordered in shells consisting of two doublets with strong- and weak-tunnel couplings, leading to gate-dependent level renormalization. By comparison to a one- and two-shell model, this is shown to be a consequence of disorder-induced valley mixing in the nanotube. Moreover, a parallel magnetic field is shown to reduce this mixing and thus suppress the effects of tunnel renormalization.
- Organisation(en)
- Quantenoptik, Quantennanophysik und Quanteninformation
- Externe Organisation(en)
- University of Copenhagen, Rheinisch-Westfälische Technische Hochschule Aachen, Nippon Telegraph and Telephone Corporation
- Journal
- Physical Review Letters
- Band
- 108
- Anzahl der Seiten
- 5
- ISSN
- 0031-9007
- DOI
- https://doi.org/10.1103/PhysRevLett.108.176802
- Publikationsdatum
- 2012
- Peer-reviewed
- Ja
- ÖFOS 2012
- 103025 Quantenmechanik
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/ebd989af-566c-4007-8084-235dc8a3507d