Rectification phenomena in two specific mesoscopic systems are reviewed. The phenomenon
is called ratchet effect, and such systems are called ratchets. In this thesis,
particularly a rocked quantum-dot ratchet, and a tunneling ratchet are considered.
The origin of the name is explained in a brief historical background. Due to rectification,
there is a net non-vanishing electronic current, whose direction can be reversed
by changing rocking amplitude, the Fermi energy, or applying magnetic field
to the devices (for the rocked ratchet), and tuning the temperature (for the tunneling
ratchet). In the last part, a theoretical examination based on the Landauer-Bü / ttiker
formalism of mesoscopic quantum transport is presented.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12606929/index.pdf |
| Date | 01 December 2005 |
| Creators | Inkaya, Ugur Yigit |
| Contributors | Turgut, Sadi |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for public access |
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