Loading...
Please wait, while we are loading the content...
Su ( 4 ) mixed valence regime in carbon nanotube quantum dots
| Content Provider | Semantic Scholar |
|---|---|
| Author | Makarovski, Alexander Finkelstein, Gleb |
| Copyright Year | 2008 |
| Abstract | We study the evolution of conductance regimes in carbon nanotubes with doubly degenerate orbitals (‘‘shells’’) by controlling the contact transparency within the same sample. For sufficiently open contacts, Kondo behavior is observed for 1, 2, and 3 electrons in the topmost shell. As the contacts are opened more, the sample enters the ‘‘mixed valence’’ regime, where different charge states are strongly hybridized by electron tunneling. Here, the conductance as a function of gate voltage shows pronounced modulations with a period of four electrons, and all single-electron features are washed away at low temperature. We successfully describe this behavior by a simple formula with no fitting parameters. Finally, we find a surprisingly small energy scale that controls the temperature evolution of conductance and the tunneling density of states in the mixed valence regime. r 2007 Elsevier B.V. All rights reserved. PACS: 73.23.Hk; 73.23. b; 75.20.Hr; 73.63.Fg |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.phy.duke.edu/~gleb/Pdf_FILES/SU4_physica_B_PHYSB302729.pdf |
| Alternate Webpage(s) | http://webhome.phy.duke.edu/~gleb/Pdf_FILES/SU4_physica_B_PHYSB302729.pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Cold Temperature Conductance (graph) Degenerate energy levels Electron Electrons Mixed reality Nanotubes Nanotubes, Carbon One-electron universe Physics and Astronomy Classification Scheme Quantum Dots Quantum dot Quantum tunnelling REM Sleep Behavior Disorder Tunneling protocol voltage |
| Content Type | Text |
| Resource Type | Article |
